Frameworks: Annotate trivial @GuardedBy in services/core

Add @GuardedBy for simple functions that require a single lock
and are named XYZLocked.

Derived by errorprone.

Bug: 73000847
Test: m
Test: m javac-check-framework RUN_ERROR_PRONE=true
Change-Id: I6993325b11c71a4ec27c21935fb54a954d95455f
diff --git a/services/core/java/com/android/server/AlarmManagerService.java b/services/core/java/com/android/server/AlarmManagerService.java
index 45b2118..7ab5812 100644
--- a/services/core/java/com/android/server/AlarmManagerService.java
+++ b/services/core/java/com/android/server/AlarmManagerService.java
@@ -4061,6 +4061,7 @@
         /**
          * Deliver an alarm and set up the post-delivery handling appropriately
          */
+        @GuardedBy("mLock")
         public void deliverLocked(Alarm alarm, long nowELAPSED, boolean allowWhileIdle) {
             if (alarm.operation != null) {
                 // PendingIntent alarm