Use INJECT_EVENTS permission for UiBench tests

Ensure UiBenchActivityTransitionsAnimationMicrobenchmark launching
EditTextTypeActivity that calls sendKeyDownUpSync is allowed without
throwing SecurityException.

Bug: 241190603
Test: atest UiBenchEditTextTypingMicrobenchmark
Change-Id: Id3c3490d7ab98a17da4e07d8d62d048c98ff1ec4

tests/UiBench/Android.bp

@@ -24,5 +24,6 @@ android_test {
         "androidx.recyclerview_recyclerview",
         "androidx.leanback_leanback",
     ],
+    certificate: "platform",
     test_suites: ["device-tests"],
 }

tests/UiBench/AndroidManifest.xml

@@ -18,6 +18,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      package="com.android.test.uibench">
+    <uses-permission android:name="android.permission.INJECT_EVENTS" />
 
     <application android:allowBackup="false"
          android:theme="@style/Theme.AppCompat.Light.DarkActionBar"