DO NOT MERGE. ActivityPicker shouldn't grant permissions. This picker has no business granting any Uri permissions, so remove any grant flags that malicious apps may have tried sneaking in. Test: builds, boots Bug: 32879772 Change-Id: I91c48c73287a271bd6c99e60e216dead22e68764 (cherry picked from commit 3f218e8431cb5648bcb46131551c133ba53ef870)