Update whitelisted package name for google vr

The vr platform lib was renamed from com.google.vr.gvr.platform to
com.google.vr.platform, so update the whitelist accordingly. Also narrow
the whitelist to just the .platform subpackage.

Bug: 38134403
Test: Booted a Marlin.
Change-Id: I9243ed3ab7a918e0bc716a7ddafe0b3c068700de
1 file changed