Clean up use of HAVE_ANDROID_OS

HAVE_ANDROID_OS was defined as "1" for targets, but never defined as "0"
for non-targets. Changing them to #ifdef should be safe and matches all
the other uses of HAVE_ANDROID_OS throughout the system.

Change-Id: I077aee39b08ce82327a571d9aca0cae422a0ebb5
1 file changed