Enforce permission INJECT_EVENTS for injecting to input filter.

Bug: 309426390
Test: atest CtsAccessibilityTestCases:AccessibilityManagerTest
Change-Id: I4a63583dcd1c7a7c388fb278ec1c1c53c135e934

core/java/android/app/UiAutomationConnection.java

@@ -183,6 +183,11 @@ public final class UiAutomationConnection extends IUiAutomationConnection.Stub {
 
     @Override
     public void injectInputEventToInputFilter(InputEvent event) throws RemoteException {
+        synchronized (mLock) {
+            throwIfCalledByNotTrustedUidLocked();
+            throwIfShutdownLocked();
+            throwIfNotConnectedLocked();
+        }
         mAccessibilityManager.injectInputEventToInputFilter(event);
     }
 

services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java

@@ -5232,6 +5232,8 @@ public class AccessibilityManagerService extends IAccessibilityManager.Stub
 
     @Override
     public void injectInputEventToInputFilter(InputEvent event) {
+        mSecurityPolicy.enforceCallingPermission(Manifest.permission.INJECT_EVENTS,
+                "injectInputEventToInputFilter");
         synchronized (mLock) {
             final long endMillis =
                     SystemClock.uptimeMillis() + WAIT_INPUT_FILTER_INSTALL_TIMEOUT_MS;