Intitialize AcceptableLeftDistance with NUM_OP-1.

Originally, on receiving any report from app AcceptableLeftDistance was decreasing below
NUM_OP. After changes introduced in ag/12060128, AcceptableLeftDistance doesn't always
change on report receipt.

Fix: 161451424
Test: atest RuntimeMessageCollectionTest
Change-Id: Id9a066d9efb16a60b2d68c78fb06bbd549c83e40

services/core/java/com/android/server/appop/AppOpsService.java

@@ -6020,7 +6020,7 @@ public class AppOpsService extends IAppOpsService.Stub {
     private void resampleAppOpForPackageLocked(@NonNull String packageName, boolean pickOp) {
         mMessagesCollectedCount = 0.0f;
         mSampledAppOpCode = pickOp ? ThreadLocalRandom.current().nextInt(_NUM_OP) : OP_NONE;
-        mAcceptableLeftDistance = _NUM_OP;
+        mAcceptableLeftDistance = _NUM_OP - 1;
         mSampledPackage = packageName;
     }