Merge "media: adding MediaFormat.KEY_IMPORTANCE" into main am: 31fd707aed

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2833532

Change-Id: I801681acb775d69a65fb57363c63d706fb2288fc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>