Pause watchdog triggering on the main thread during OtaDexoptService

Similar to I3876c41e6d0e41d044a5b1d5e57f894c7fb4fb0e where we pause
the watchdog because dexopting can take a while, here moving A/B
artificats can take a long time.

Bug: 134062700
Test: Manually tested by adding an artificial sleep in
OtaDexoptService#main and verified that watchdog was not triggered

Change-Id: I69067fbbb8be4e421918c18b67269044fab51b3e

services/java/com/android/server/SystemServer.java

@@ -749,10 +749,12 @@ public final class SystemServer {
             if (!disableOtaDexopt) {
                 traceBeginAndSlog("StartOtaDexOptService");
                 try {
+                    Watchdog.getInstance().pauseWatchingCurrentThread("moveab");
                     OtaDexoptService.main(mSystemContext, mPackageManagerService);
                 } catch (Throwable e) {
                     reportWtf("starting OtaDexOptService", e);
                 } finally {
+                    Watchdog.getInstance().resumeWatchingCurrentThread("moveab");
                     traceEnd();
                 }
             }