Make HasFloat16 true for all architectures

Upstream Clang removed _Float16 literal support on non-ARM targets.
frameworks/ml/nn makes heavy use of _Float16 on x86, causing it fail to
build.

Make HasFloat16 true for now in Android toolchain so that NN could
continue to build.

Bug: 127391056
Change-Id: I2be6122d7b1dd8622d6b71606552e2afbfff62a4
1 file changed