Flip ENABLE_DYNAMIC_PERMISSIONS, attempt #7.

Ib0021d3fd34294bb7497c8827e7ee99d4ac64d73 fixes the app compatibility
issue(b/159995598).

Bug: 115619667
Test: atest ExternalStorageHostTest#testGrantUriPermission
Test: atest ExternalStorageHostTest#testGrantUriPermission29
Merged-In: I413ccf8c31de6525a737c8336a904456fdbeb9e1
Change-Id: I413ccf8c31de6525a737c8336a904456fdbeb9e1
(cherry picked from commit 8bf78650)