Resetting cmd buffers in various ways to understand VK driver perf on
various devices.

Also includes some changes to get the chromium APK wrapper for
angle_white_box_perftests compiling.

Bug: angleproject:3137
Change-Id: I56bd163cdd6605ce09effe509a9c7ac5e0008e7a
Reviewed-on: https://chromium-review.googlesource.com/c/1456482
Commit-Queue: Tobin Ehlis <tobine@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>