Use "org.chromium.angle.agi" for the specially-built ANGLE APK for
Android Graphics Inspector (AGI).  This will allow AGI to work with a
version of ANGLE that is built for it regardless of what other
version(s) of ANGLE are or aren't installed on the device.

Continue to use "org.chromium.angle" for developer builds.

Bug: b/168745566
Change-Id: I4610d3b1eec6b0564d020dca7bd1f9e9d6532a64
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2684920Reviewed-by: Tim Van Patten <timvp@google.com>
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Ian Elliott <ianelliott@google.com>