Fix trigger sensor lifecycle

Make sure the mRegistered flag is updated early enough, so we don't
call cancel if we are not registered.

Bug: 23105138
Change-Id: I1feeab9ea3d0ca31eb5deaab97f6de2cfc4c3b3d

packages/SystemUI/src/com/android/systemui/doze/DozeService.java

@@ -534,8 +534,8 @@ public class DozeService extends DreamService {
                     }
                 }
 
-                requestPulse(mPulseReason);
                 mRegistered = false;
+                requestPulse(mPulseReason);
                 updateListener();  // reregister, this sensor only fires once
 
                 // reset the notification pulse schedule, but only if we think we were not triggered