profcollect: Fix possible NPE in ProfcollectBGJobService

The native service might have died, in which case, abort.

Test: presubmit
Bug: 246660820
Change-Id: I171a0031db104d2c008ee7ef9709f15f76d70b1a

services/profcollect/src/com/android/server/profcollect/ProfcollectForwardingService.java

@@ -218,6 +218,9 @@ public final class ProfcollectForwardingService extends SystemService {
             BackgroundThread.get().getThreadHandler().post(
                     () -> {
                         try {
+                            if (sSelfService.mIProfcollect == null) {
+                                return;
+                            }
                             sSelfService.mIProfcollect.process();
                         } catch (RemoteException e) {
                             Log.e(LOG_TAG, "Failed to process profiles in background: "