Support AMR as a file type so that it can be imported into movie studio

Change-Id: I3fc4f49ae0a210f53b1bab68716f4e558b3d91c5
related-to-bug: 5419452

Author: James Dong

media/java/android/media/videoeditor/AudioTrack.java

@@ -147,14 +147,16 @@ public AudioTrack(VideoEditor editor, String audioTrackId, String filename) thro
         } catch (Exception e) {
             throw new IllegalArgumentException(e.getMessage() + " : " + filename);
         }
-        switch (mMANativeHelper.getFileType(properties.fileType)) {
+        int fileType = mMANativeHelper.getFileType(properties.fileType);
+        switch (fileType) {
             case MediaProperties.FILE_3GP:
             case MediaProperties.FILE_MP4:
             case MediaProperties.FILE_MP3:
+            case MediaProperties.FILE_AMR:
                 break;
 
             default: {
-                throw new IllegalArgumentException("Unsupported input file type");
+                throw new IllegalArgumentException("Unsupported input file type: " + fileType);
             }
         }
         switch (mMANativeHelper.getAudioCodecType(properties.audioFormat)) {

media/java/android/media/videoeditor/MediaArtistNativeHelper.java

@@ -3239,6 +3239,9 @@ int getFileType(int fileType) {
             case FileType.M4V:
                 retValue = MediaProperties.FILE_M4V;
                 break;
+            case FileType.AMR:
+                retValue = MediaProperties.FILE_AMR;
+                break;
 
             default:
                 retValue = -1;

media/java/android/media/videoeditor/MediaProperties.java

@@ -286,7 +286,7 @@ public final class MPEG4Level {
      */
     public static final int FILE_3GP = 0;
     public static final int FILE_MP4 = 1;
-    // 2 is for AMRNB
+    public static final int FILE_AMR = 2;
     public static final int FILE_MP3 = 3;
     // 4 is for PCM
     public static final int FILE_JPEG = 5;