Use decoders with names that don't start "OMX.".

There is no guarantee codec names start with this prefix in >= L.

Issue: #782

library/src/main/java/com/google/android/exoplayer/MediaCodecUtil.java

@@ -173,8 +173,7 @@ public final class MediaCodecUtil {
    */
   private static boolean isCodecUsableDecoder(MediaCodecInfo info, String name,
       boolean secureDecodersExplicit) {
-    if (info.isEncoder() || !name.startsWith("OMX.")
-        || (!secureDecodersExplicit && name.endsWith(".secure"))) {
+    if (info.isEncoder() || (!secureDecodersExplicit && name.endsWith(".secure"))) {
       return false;
     }