Frameworks/base: Wall Werror in rs

Turn on -Wall -Werror in rs/. Fix warnings.

Change-Id: I41923e4578edf26dbf6a31a83b6999e80d6d385a
Frameworks/base: Fix FingerprintManager JNI

Register the right method.

Change-Id: I0806c2fa8f29ddef75caaf94092f72e644ae6d06
Merge "Frameworks/base: Wall Werror in rs"
Merge "Frameworks/base: Fix FingerprintManager JNI"