Merge "Add android:exported tag" into sc-dev-plus-aosp am: 15296de7ff am: f7f3cf74c0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/15601196

Change-Id: I2b4a86b6f50f0dd7c0786e493c2288aa61ccb0f1