Merge "Add .clang-format to frameworks/av" am: e887c77709 am: d556d4060d am: 898bb8f4a0

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1794568

Change-Id: Icfb35b28cd6158977c88d90290d0a376a266a6c1