Add optional logging to investigate URI grants.

Developers are seeing odd reports of URI permission grants
disappearing unexpectedly.  This optional logging can be enabled to
show exactly where granting/revoking is happening.

Bug: 30978171
Change-Id: I8a5a976f42d4b71270e69c5597dfcb5d89e18848
(cherry picked from commit d16b1258b2bda629477c73db1d3699a22d90f725)
1 file changed