Avoid syncing out AndroidManifest for Glide's instrumentation tests.

PiperOrigin-RevId: 250802871

instrumentation/src/androidTest/AndroidManifest.xml

-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-  package="com.bumptech.glide.instrumentation.test">
-  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
-  <application android:label="GlideTest">
-    <uses-library android:name="android.test.runner" />
-  </application>
-
-  <instrumentation android:targetPackage="com.bumptech.glide.instrumentation"
-                   android:name="com.google.android.apps.common.testing.testrunner.Google3InstrumentationTestRunner"
-                   android:label="Glide Emulator Tests" />
-</manifest>