Add updatable-media jarjar rules to framework-all

Prevents the robolectric shadows jar from including ExoPlayer
symbols, which collide with app-bundled class files.

Bug: 161753405
Test: Manually checked robolectric jar contents.
Test: Built sargo-userdebug, flashed and tested on physical device.
Change-Id: I3bdc9e0b22cd0dea40f5bad15b0e6c619d32faf6
diff --git a/framework-jarjar-rules.txt b/framework-jarjar-rules.txt
index d8af726..70dedb8 100644
--- a/framework-jarjar-rules.txt
+++ b/framework-jarjar-rules.txt
@@ -1,2 +1,6 @@
 rule android.hidl.** android.internal.hidl.@1
 rule android.net.wifi.WifiAnnotations* android.internal.wifi.WifiAnnotations@1
+
+# Hide media mainline module implementation classes to avoid collisions with
+# app-bundled ExoPlayer classes.
+rule com.google.android.exoplayer2.** android.media.internal.exo.@1