Fix FATAL Exception in PostCallActivity

Use Theme.AppCompat.Light to fix IllegalStateException for
PostCallActivity extending AppCompatActivity.

Test: am start -n com.android.dialer/.postcall.PostCallActivity

Change-Id: Ica815d43cd8dae73fbc8ec948dd701a1455d1704
Signed-off-by: Taesu Lee <taesu82.lee@samsung.com>
1 file changed