Reland "Add espresso tests for PhotoPicker"

Bug: 168001592
Test: atest
com.android.providers.media.photopicker.espresso

Change-Id: Ib593a56142ce5fff169bfef428bba9f2cf97cee9
diff --git a/tests/AndroidManifest.xml b/tests/AndroidManifest.xml
index 199f617..68b6eed 100644
--- a/tests/AndroidManifest.xml
+++ b/tests/AndroidManifest.xml
@@ -13,6 +13,14 @@
         <activity android:name="com.android.providers.media.GetResultActivity" />
         <activity android:name="com.android.providers.media.PermissionActivity" />
         <activity android:name="com.android.providers.media.CacheClearingActivity" />
+        <activity android:name="com.android.providers.media.photopicker.PhotoPickerActivity"
+                  android:theme="@style/PickerDefaultTheme"
+                  android:excludeFromRecents="true">
+            <intent-filter>
+                <action android:name="android.provider.action.PICK_IMAGES" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
     </application>
 
     <instrumentation android:name="androidx.test.runner.AndroidJUnitRunner"