DeskClock - Moved the android:targetSdkVersion to 25 to fix "Clock has stopped" message displayed when Alarm trigger. am: e88d40eece am: f83beccc88 am: df9de353bb am: 7305e09159

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/DeskClock/+/12661641

Change-Id: I66061d294210a845de87c95ed0963959f53300f1