android/binder_*: add <stdbool.h>...

...to files with C API using bool.

(I've left the ones where the only uses of bool are in C++ anyway, since
those headers are obviously not usable from C.)

Bug: https://github.com/android/ndk/issues/1281
Test: treehugger
Change-Id: I616a8482bcdbb391ec8c028d6b6a70b1d9d08960