Add Home / Launcher apps indexing

- add a BaseSearchIndexProvider to HomeSettings
- use a BroadcastReceiver for tracking add or remove of
Home / Launcher apps
- add "launcher" synonym for "home" too

- also code cleaning for DynamicIndexableContentMonitor

See bug: #16484927 Add "launcher" as a synonym for "home" in settings search

Change-Id: I819f4e5f7bd5e9a7882609206b2733ea1912fc69
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index fac2d34..277a56e 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -1832,5 +1832,19 @@
             </intent-filter>
         </provider>
 
+        <receiver android:name=".search.HomePackageReceiver"
+                  android:exported="false">
+            <intent-filter>
+                <action android:name="android.intent.action.PACKAGE_ADDED" />
+                <action android:name="android.intent.action.PACKAGE_CHANGED" />
+                <action android:name="android.intent.action.PACKAGE_REMOVED" />
+
+                <category android:name="android.intent.category.HOME" />
+                <category android:name="android.intent.category.LAUNCHER" />
+
+                <data android:scheme="package"/>
+            </intent-filter>
+        </receiver>
+
     </application>
 </manifest>