update: media3 library migration done

Author: gowtham-balamurugan-13309

library/proguard-rules.pro

@@ -20,10 +20,3 @@
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
 #-keep class com.arthenica.mobileffmpeg.* { *; }
--keep class com.arthenica.mobileffmpeg.Config {
-    native <methods>;
-}
-
--keep class com.arthenica.mobileffmpeg.AbiDetect {
-    native <methods>;
-}