[Android] Update NDK version check for hardware buffer. The function used for checking if hardware buffer is supported requires NDK 29, but is currently checking if 26+ is in use. This was not an issue before, but when updating the minimum SDK (and NDK) version in Chromium, this led to an inconsistency. For now, increasing the version requirement to 29+, and therefore also removing the unnecessary branch for lock planes support. Bug: chromium:1497004 Change-Id: I3d6e60e51db0831ee81d817aec90760d7680cc31 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4985624 Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Kenneth Russell <kbr@chromium.org>