Add some missing functions,
modify preprocessor conditions and build files
to include some other missing functions when building for Android.

BUG=angleproject:1471

Change-Id: Iadc0a0b9fed2444b8bc9a894ee65c8b66ea7f3c9
Reviewed-on: https://chromium-review.googlesource.com/368982
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>