Create orientation matrix byte array using util method

PiperOrigin-RevId: 514375835

library/common/src/main/java/com/google/android/exoplayer2/util/Util.java

@@ -200,6 +200,23 @@ public final class Util {
     return outputStream.toByteArray();
   }
 
+  /**
+   * Converts an array of 32-bit integers into an equivalent byte array.
+   *
+   * <p>Each integer is converted into 4 sequential bytes.
+   */
+  public static byte[] toByteArray(int... values) {
+    byte[] array = new byte[values.length * 4];
+    int index = 0;
+    for (int value : values) {
+      array[index++] = (byte) (value >> 24);
+      array[index++] = (byte) (value >> 16);
+      array[index++] = (byte) (value >> 8);
+      array[index++] = (byte) (value /* >> 0 */);
+    }
+    return array;
+  }
+
   /**
    * Registers a {@link BroadcastReceiver} that's not intended to receive broadcasts from other
    * apps. This will be enforced by specifying {@link Context#RECEIVER_NOT_EXPORTED} if {@link

testdata/src/test/assets/muxerdumps/mp4_with_180_orientation.mp4.dump

@@ -0,0 +1,27 @@
+seekMap:
+  isSeekable = true
+  duration = 0
+  getPosition(0) = [[timeUs=0, position=44]]
+  getPosition(1) = [[timeUs=0, position=44]]
+  getPosition(0) = [[timeUs=0, position=44]]
+  getPosition(0) = [[timeUs=0, position=44]]
+numberOfTracks = 1
+track 0:
+  total output bytes = 55
+  sample count = 1
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.9B2BF3
+    maxInputSize = 85
+    width = 12
+    height = 10
+    rotationDegrees = 180
+    initializationData:
+      data = length 24, hash 7F12E259
+      data = length 5, hash 1B4D906
+  sample 0:
+    time = 0
+    flags = 536870913
+    data = length 55, hash A481CEF4
+tracksEnded = true

testdata/src/test/assets/muxerdumps/mp4_with_270_orientation.mp4.dump

@@ -0,0 +1,27 @@
+seekMap:
+  isSeekable = true
+  duration = 0
+  getPosition(0) = [[timeUs=0, position=44]]
+  getPosition(1) = [[timeUs=0, position=44]]
+  getPosition(0) = [[timeUs=0, position=44]]
+  getPosition(0) = [[timeUs=0, position=44]]
+numberOfTracks = 1
+track 0:
+  total output bytes = 55
+  sample count = 1
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.9B2BF3
+    maxInputSize = 85
+    width = 12
+    height = 10
+    rotationDegrees = 270
+    initializationData:
+      data = length 24, hash 7F12E259
+      data = length 5, hash 1B4D906
+  sample 0:
+    time = 0
+    flags = 536870913
+    data = length 55, hash A481CEF4
+tracksEnded = true