Use Search.SOURCE from android-common

The SOURCE (search source identifier) constant is moving
from hidden in android.app.SearchManager to com.android.common.Search.

Part of http://b/issue?id=2429556

Change-Id: I68fa792f2d452aadcb9216f5c780bd082ca5039f

Android.mk

@@ -19,6 +19,8 @@ include $(CLEAR_VARS)
 
 LOCAL_MODULE_TAGS := optional
 
+LOCAL_STATIC_JAVA_LIBRARIES := android-common
+
 LOCAL_SRC_FILES := $(call all-subdir-java-files)
 
 LOCAL_PACKAGE_NAME := Launcher2

src/com/android/launcher2/Launcher.java

@@ -16,6 +16,8 @@
 
 package com.android.launcher2;
 
+import com.android.common.Search;
+
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.Dialog;
@@ -963,7 +965,7 @@ public final class Launcher extends Activity
         }
         if (appSearchData == null) {
             appSearchData = new Bundle();
-            appSearchData.putString(SearchManager.SOURCE, "launcher-search");
+            appSearchData.putString(Search.SOURCE, "launcher-search");
         }
 
         final SearchManager searchManager =