Merge "Include <stdbool.h> in NDK headers that use bool." into rvc-dev-plus-aosp am: 456513b73e am: cdceadbd05

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/11851227

Change-Id: I190f107be440ccf933a142d9bd2b20111c716a2e