Bug: 22567809 CTS: Fugu: android.text.format.cts related tests failing

Fixed DateFormatTest#test_is24HourFormat failing due to new permission change in
M by setting appops to allow android:write_settings during test before operation
is executed.

Change-Id: I8b36e5712840acba69bc1d2fc46a24c9b20247f8
1 file changed