Include the check on the mAllowStartByBindings flag in the BG-FGS start logic

The previous CL for the b/276963716 refactored the checks on the BG-FGS
start restriction. Here we're updating the check to include the flag
"mAllowStartByBindings".

There will be follow-up CLs which would eventually get rid of the
use of mAllowStartInBindService, maybe based on the targetSDK level
check.

Bug: 302248694
Test: atest android.app.cts.ActivityManagerFgsBgStartTest
Test: atest CtsShortFgsTestCases
Change-Id: I01f045bddcf78363a3295f141ff06a7f9db7e970

services/core/java/com/android/server/am/ServiceRecord.java

@@ -246,7 +246,9 @@ final class ServiceRecord extends Binder implements ComponentName.WithComponentN
     int getFgsAllowStart() {
         return mAllowStartForegroundNoBinding != REASON_DENIED
                 ? mAllowStartForegroundNoBinding
-                : mAllowStartInBindService;
+                : (mAllowStartByBindings != REASON_DENIED
+                ? mAllowStartByBindings
+                : mAllowStartInBindService);
     }
 
     boolean isFgsAllowedStart() {