Bug 1389990 - back out d5210a2cb19a (Bug 1365505 - Part1-Make the feature flag be exposed not only on nightly. ) r=kikuo"

MozReview-Commit-ID: BZfwYV4QUeS

--HG--
extra : rebase_source : 858be32a0e61dc3762a0177d14d63162b7771305

mobile/android/moz.configure

@@ -88,7 +88,7 @@ project_flag('MOZ_SWITCHBOARD',
 
 project_flag('MOZ_ANDROID_HLS_SUPPORT',
              help='Enable HLS (HTTP Live Streaming) support (currently using the ExoPlayer library)',
-             default=True)
+             default=milestone.is_nightly)
 
 option(env='MOZ_ANDROID_ACTIVITY_STREAM',
        help='Enable Activity Stream on Android (replacing the default HomePager)',