Merge changes from topics "ndk-fixed-size-array", "simplify-ndk-backend" am: 3183b5c2cc am: 3f1d935b11 am: a546ac860d am: 3f678a9038

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1906327

Change-Id: Ia4d938ac977424f308bc4e558772e84d7bfcdadc