Allow global database access to file managers

Apps holding MANAGE_EXTERNAL_STORAGE appop should have global access
to all files on external storage

Test: atest
android.appsecurity.cts.ExternalStorageHostTest#testMediaSandboxedFull
Bug: 135341433

Change-Id: If0390b1249049dad14d093d0ed8689b59bb5ac16
1 file changed