Remove blocking binder calls from isInUse method

Bug: 145749943
Test: adb shell am start-activity \
    -n com.android.dynsystem/com.android.dynsystem.VerificationActivity \
    -a android.os.image.action.START_INSTALL \
    -d file:///storage/emulated/0/Download/system.raw.gz \
    --el KEY_SYSTEM_SIZE $(du -b system.raw|cut -f1) \
    --el KEY_USERDATA_SIZE 8589934592

Change-Id: I56324c13eada832e3a319ddd9f6c5b2ab414684e

services/core/java/com/android/server/DynamicSystemService.java

@@ -179,18 +179,7 @@ public class DynamicSystemService extends IDynamicSystemService.Stub implements
 
     @Override
     public boolean isInUse() throws RemoteException {
-        boolean gsidWasRunning = "running".equals(SystemProperties.get("init.svc.gsid"));
-        boolean isInUse = false;
-
-        try {
-            isInUse = getGsiService().isGsiRunning();
-        } finally {
-            if (!gsidWasRunning && !isInUse) {
-                mGsiService = null;
-            }
-        }
-
-        return isInUse;
+        return SystemProperties.getBoolean("ro.gsid.image_running", false);
     }
 
     @Override