Add device-specific workarounds for VP8 and MP3.

Avoid using the VP8 decoder on Samsung Galaxy S4 Mini.
Issue: #548

Avoid using the MP3 decoder on Sony Xperia Z/API level 16.
Issue: #377

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

@@ -175,15 +175,22 @@ public class MediaCodecUtil {
       return false;
       return false;
     }
     }
 
 
-    // Workaround an issue where creating a particular MP3 decoder on some HTC devices on platform
-    // API version 16 crashes mediaserver.
+    // Work around an issue where creating a particular MP3 decoder on some devices on platform API
+    // version 16 crashes mediaserver.
     if (Util.SDK_INT == 16
     if (Util.SDK_INT == 16
         && ("dlxu".equals(Util.DEVICE) // HTC Butterfly
         && ("dlxu".equals(Util.DEVICE) // HTC Butterfly
-            || "protou".equals(Util.DEVICE)) // HTC Desire X
+            || "protou".equals(Util.DEVICE) // HTC Desire X
+            || "C6602".equals(Util.DEVICE) || "C6603".equals(Util.DEVICE)) // Sony Xperia Z
         && name.equals("OMX.qcom.audio.decoder.mp3")) {
         && name.equals("OMX.qcom.audio.decoder.mp3")) {
       return false;
       return false;
     }
     }
 
 
+    // Work around an issue where the VP8 decoder on Samsung Galaxy S4 Mini does not render video.
+    if (Util.SDK_INT <= 19 && Util.DEVICE != null && Util.DEVICE.startsWith("serrano")
+        && "samsung".equals(Util.MANUFACTURER) && name.equals("OMX.SEC.vp8.dec")) {
+      return false;
+    }
+
     return true;
     return true;
   }
   }
 
 

library/src/main/java/com/google/android/exoplayer/util/Util.java

@@ -69,6 +69,12 @@ public final class Util {
    */
    */
   public static final String DEVICE = android.os.Build.DEVICE;
   public static final String DEVICE = android.os.Build.DEVICE;
 
 
+  /**
+   * Like {@link android.os.Build#MANUFACTURER}, but in a place where it can be conveniently
+   * overridden for local testing.
+   */
+  public static final String MANUFACTURER = android.os.Build.MANUFACTURER;
+
   private static final Pattern XS_DATE_TIME_PATTERN = Pattern.compile(
   private static final Pattern XS_DATE_TIME_PATTERN = Pattern.compile(
       "(\\d\\d\\d\\d)\\-(\\d\\d)\\-(\\d\\d)[Tt]"
       "(\\d\\d\\d\\d)\\-(\\d\\d)\\-(\\d\\d)[Tt]"
       + "(\\d\\d):(\\d\\d):(\\d\\d)(\\.(\\d+))?"
       + "(\\d\\d):(\\d\\d):(\\d\\d)(\\.(\\d+))?"