Accessibility shortcut improvement (3/n)

- New class AccessibilityShortcutInfo to describe accessibility
  shortcut.
- New Intent category for the target of accessibility shortcut

Bug: 136293963
Test: atest AccessibilityShortcutInfoTest
Change-Id: Id47d397a03f3f710368550e551097214c7839943
diff --git a/core/tests/coretests/AndroidManifest.xml b/core/tests/coretests/AndroidManifest.xml
index 2417209..c7e54f3 100644
--- a/core/tests/coretests/AndroidManifest.xml
+++ b/core/tests/coretests/AndroidManifest.xml
@@ -1155,7 +1155,10 @@
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.FRAMEWORK_INSTRUMENTATION_TEST" />
+                <category android:name="android.intent.category.ACCESSIBILITY_SHORTCUT_TARGET" />
             </intent-filter>
+            <meta-data android:name="android.accessibilityshortcut.target"
+                       android:resource="@xml/accessibility_shortcut_test_activity"/>
         </activity>
 
         <!-- Activity-level metadata -->