Support highlighting the menu entry for Search results

1. Add a receiver to monitor the search state
2. Shoe/hide the menu highlight in the listener
3. Highlight the menu entry in SearchResultTrampoline
4. Enable/disable the receiver in SettingsInitialize

Bug: 205781792
Test: manual, robotest
Change-Id: Ia04901f504172f4f0c7b4b2ea7eda5f3713f676d

src/com/android/settings/search/SearchStateReceiver.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.search;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.text.TextUtils;
+import android.util.Log;
+
+import com.android.settings.SettingsApplication;
+import com.android.settings.homepage.SettingsHomepageActivity;
+
+/**
+ * A broadcast receiver that monitors the search state to show/hide the menu highlight
+ */
+public class SearchStateReceiver extends BroadcastReceiver {
+
+    private static final String TAG = "SearchStateReceiver";
+    private static final String ACTION_SEARCH_START = "com.android.settings.SEARCH_START";
+    private static final String ACTION_SEARCH_EXIT = "com.android.settings.SEARCH_EXIT";
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        if (intent == null) {
+            Log.w(TAG, "Null intent");
+            return;
+        }
+
+        final SettingsHomepageActivity homeActivity =
+                ((SettingsApplication) context.getApplicationContext()).getHomeActivity();
+        if (homeActivity == null) {
+            return;
+        }
+
+        final String action = intent.getAction();
+        Log.d(TAG, "action: " + action);
+        if (TextUtils.equals(ACTION_SEARCH_START, action)) {
+            homeActivity.getMainFragment().setMenuHighlightShowed(false);
+        } else if (TextUtils.equals(ACTION_SEARCH_EXIT, action)) {
+            homeActivity.getMainFragment().setMenuHighlightShowed(true);
+        }
+    }
+}