Move (almost all) remaining core library instrumentation tests to Robolectric.

There are 4 tests which can't currently be moved:
 - DownloadManagerTest explicitly uses the main looper which isn't easily
   supported because the test runs on this thread.
 - ContentDataSourceTest uses an AssetFileDescriptor which wraps a
   ParcelFileDescriptor. It seems Robolectric doesn't correctly forward the
   inner wrapped file descriptor leading to NPE.
 - CacheContentIndexTest and SimpleCacheSpanTest both work fine with Gradle
   but fail with seemingly valid test failures on Blaze.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=185366678

extensions/flac/src/androidTest/java/com/google/android/exoplayer2/ext/flac/FlacExtractorTest.java

@@ -34,11 +34,14 @@ public class FlacExtractorTest extends InstrumentationTestCase {
   }
 
   public void testSample() throws Exception {
-    ExtractorAsserts.assertBehavior(new ExtractorFactory() {
-      @Override
-      public Extractor create() {
-        return new FlacExtractor();
-      }
-    }, "bear.flac", getInstrumentation());
+    ExtractorAsserts.assertBehavior(
+        new ExtractorFactory() {
+          @Override
+          public Extractor create() {
+            return new FlacExtractor();
+          }
+        },
+        "bear.flac",
+        getInstrumentation().getContext());
   }
 }

library/core/src/androidTest/assets/ssa/typical_format

@@ -1 +0,0 @@
-Format: Layer, Start, End, Style, Name, Text

library/core/src/test/AndroidManifest.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2016 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="com.google.android.exoplayer2.core.test">
+
+  <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="26"/>
+
+</manifest>

library/core/src/test/assets/ssa/invalid_timecodes

@@ -9,4 +9,4 @@ Style: Default,Open Sans Semibold,36,&H00FFFFFF,&H000000FF,&H00020713,&H00000000
 Format: Layer, Start, End, Style, Name, Text
 Dialogue: 0,Invalid,0:00:01.23,Default,Olly,This is the first subtitle{ignored}.
 Dialogue: 0,0:00:02.34,Invalid,Default,Olly,This is the second subtitle \nwith a newline \Nand another.
-Dialogue: 0,0:00:04:56,0:00:08:90,Default,Olly,This is the third subtitle, with a comma.
+Dialogue: 0,0:00:04:56,0:00:08:90,Default,Olly,This is the third subtitle, with a comma.

library/core/src/test/assets/ssa/no_end_timecodes

@@ -9,4 +9,4 @@ Style: Default,Open Sans Semibold,36,&H00FFFFFF,&H000000FF,&H00020713,&H00000000
 Format: Layer, Start, End, Style, Name, Text
 Dialogue: 0,0:00:00.00,          ,Default,Olly,This is the first subtitle.
 Dialogue: 0,0:00:02.34,          ,Default,Olly,This is the second subtitle \nwith a newline \Nand another.
-Dialogue: 0,0:00:04.56,          ,Default,Olly,This is the third subtitle, with a comma.
+Dialogue: 0,0:00:04.56,          ,Default,Olly,This is the third subtitle, with a comma.

library/core/src/test/assets/ssa/typical

@@ -9,4 +9,4 @@ Style: Default,Open Sans Semibold,36,&H00FFFFFF,&H000000FF,&H00020713,&H00000000
 Format: Layer, Start, End, Style, Name, Text
 Dialogue: 0,0:00:00.00,0:00:01.23,Default,Olly,This is the first subtitle{ignored}.
 Dialogue: 0,0:00:02.34,0:00:03.45,Default,Olly,This is the second subtitle \nwith a newline \Nand another.
-Dialogue: 0,0:00:04:56,0:00:08:90,Default,Olly,This is the third subtitle, with a comma.
+Dialogue: 0,0:00:04:56,0:00:08:90,Default,Olly,This is the third subtitle, with a comma.

library/core/src/test/assets/ssa/typical_dialogue

@@ -1,3 +1,3 @@
 Dialogue: 0,0:00:00.00,0:00:01.23,Default,Olly,This is the first subtitle{ignored}.
 Dialogue: 0,0:00:02.34,0:00:03.45,Default,Olly,This is the second subtitle \nwith a newline \Nand another.
-Dialogue: 0,0:00:04:56,0:00:08:90,Default,Olly,This is the third subtitle, with a comma.
+Dialogue: 0,0:00:04:56,0:00:08:90,Default,Olly,This is the third subtitle, with a comma.

library/core/src/test/assets/ssa/typical_format

@@ -0,0 +1 @@
+Format: Layer, Start, End, Style, Name, Text

library/core/src/test/assets/ssa/typical_header

@@ -3,4 +3,4 @@ Title: SomeTitle
 
 [V4+ Styles]
 Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
-Style: Default,Open Sans Semibold,36,&H00FFFFFF,&H000000FF,&H00020713,&H00000000,-1,0,0,0,100,100,0,0,1,1.7,0,2,0,0,28,1
+Style: Default,Open Sans Semibold,36,&H00FFFFFF,&H000000FF,&H00020713,&H00000000,-1,0,0,0,100,100,0,0,1,1.7,0,2,0,0,28,1

library/core/src/test/assets/subrip/no_end_timecodes

@@ -8,4 +8,4 @@ We interpret it to mean that a subtitle extends to the start of the next one.
 
 3
 00:00:03,456 -->
-Or to the end of the media.
+Or to the end of the media.

library/core/src/test/assets/subrip/typical

@@ -9,4 +9,4 @@ Second subtitle with second line.
 
 3
 00:00:04,567 --> 00:00:08,901
-This is the third subtitle.
+This is the third subtitle.

library/core/src/test/assets/subrip/typical_extra_blank_line

@@ -10,4 +10,4 @@ Second subtitle with second line.
 
 3
 00:00:04,567 --> 00:00:08,901
-This is the third subtitle.
+This is the third subtitle.

library/core/src/test/assets/subrip/typical_missing_sequence

@@ -8,4 +8,4 @@ Second subtitle with second line.
 
 3
 00:00:04,567 --> 00:00:08,901
-This is the third subtitle.
+This is the third subtitle.

library/core/src/test/assets/subrip/typical_missing_timecode

@@ -8,4 +8,4 @@ Second subtitle with second line.
 
 3
 00:00:04,567 --> 00:00:08,901
-This is the third subtitle.
+This is the third subtitle.

library/core/src/test/assets/subrip/typical_unexpected_end

@@ -7,4 +7,4 @@ This is the first subtitle.
 This is the second subtitle.
 Second subtitle with second line.
 
-3
+3

library/core/src/test/assets/subrip/typical_with_byte_order_mark

@@ -9,4 +9,4 @@ Second subtitle with second line.
 
 3
 00:00:04,567 --> 00:00:08,901
-This is the third subtitle.
+This is the third subtitle.