Remove assumption about 'external' volume Remove assumption that will fail for 'external' parameter. The tests should now handle any volume fine anyway. BUG: 159197779 Test: atest MediaStore_Images_MediaTest#testUpsert Test: atest MediaStore_Images_MediaTest#testUpdateAndReplace Change-Id: I7c5ab7d2b1f443a8886e594b56a37b9e1da9fee0