Only open GCA if ARC is P or above

This CL changes the consolidated camera app icon logic so that it
launches GCA/GCA migration app only if ARC is P or above. This is to
address 2 problems:

1. Android N and below do not support external cameras. We would like
users to use CCA so that they can still utilize external cameras.
2. Managed users in Android N still have the problem where GCA could be
stripped out.

Bug: b:118860552,chromium:896140
Test: Used N devices (caroline) with google.com account and verified
that CCA is opened.

Change-Id: I7836d2b4256856028901e5e542f460e7107fc8db
Reviewed-on: https://chromium-review.googlesource.com/c/1316982
Commit-Queue: Sheng-hao Tsao <shenghao@google.com>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Tao Wu <wutao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606795}
1 file changed