These methods are unavailable on ARM platforms.

Also fix a sequencing bug that caused us to incorrectly define the
Android platform as Linux.

BUG=angle:773

Change-Id: Id2b47acdd5b574c618ac86641a1a8238fbb4a2c3
Reviewed-on: https://chromium-review.googlesource.com/240095Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>