Adding alarms and reminders activity

Adding a settings screen to control the permission SCHEDULE_EXACT_ALARM.
Apps can start this by starting a newly introduced API intent
REQUEST_SCHEDULE_EXACT_ALARM.

Test: make -j RunSettingsRoboTests
Manually by UI inspection:
Settings -> Apps -> Special App access -> Alarms and Reminders
or by running:
adb shell am start -a android.settings.REQUEST_SCHEDULE_EXACT_ALARM

Bug: 171306433
Bug: 171305516
Change-Id: I1293d38fc50a22b2af46f80ab24f676ed632f964

src/com/android/settings/applications/AppStateAppOpsBridge.java

@@ -277,7 +277,7 @@ public abstract class AppStateAppOpsBridge extends AppStateBaseBridge {
             if (pe == null) {
                 Log.w(TAG, "AppOp permission exists for package " + packageOp.getPackageName()
                         + " of user " + userId + " but package doesn't exist or did not request "
-                        + mPermissions + " access");
+                        + Arrays.toString(mPermissions) + " access");
                 continue;
             }