Bug 1509316 - p2: enable MediaCodec for WebRTC on Android. r=jya

Differential Revision: https://phabricator.services.mozilla.com/D45772

--HG--
extra : moz-landing-system : lando

modules/libpref/init/StaticPrefList.yaml

@@ -6142,10 +6142,9 @@
 
   # Use MediaDataDecoder API for VP8/VP9 in WebRTC. This includes hardware
   # acceleration for decoding.
-  # disable on android bug 1509316
 -   name: media.navigator.mediadatadecoder_vpx_enabled
     type: RelaxedAtomicBool
-  #if defined(NIGHTLY_BUILD) && !defined(ANDROID)
+  #if defined(NIGHTLY_BUILD)
     value: true
   #else
     value: false
@@ -6153,12 +6152,10 @@
     mirror: always
 
   # Use MediaDataDecoder API for H264 in WebRTC. This includes hardware
-  # acceleration for decoding. False on Android due to bug 1509316.
+  # acceleration for decoding.
 -   name: media.navigator.mediadatadecoder_h264_enabled
     type: RelaxedAtomicBool
-  #if defined(ANDROID)
-    value: false
-  #elif defined(_ARM64_) && defined(XP_WIN)
+  #if defined(_ARM64_) && defined(XP_WIN)
     value: false
   #else
     value: true