Move GearPreference to widget package.

- This is step1 of making gear preference more flexible to use.

Bug: 33579296
Test: builds
Change-Id: I30ac6c75f7ad16ec5c732fbb93170e5fab0eacb7

res/xml/security_settings_chooser.xml

@@ -22,7 +22,7 @@
         android:key="security_category"
         android:title="@string/lock_settings_title">
 
-        <com.android.settings.GearPreference
+        <com.android.settings.widget.GearPreference
             android:key="unlock_set_or_change"
             android:title="@string/unlock_set_unlock_launch_picker_title"
             android:summary="@string/unlock_set_unlock_mode_none"

res/xml/security_settings_password.xml

@@ -22,7 +22,7 @@
         android:key="security_category"
         android:title="@string/lock_settings_title">
 
-        <com.android.settings.GearPreference
+        <com.android.settings.widget.GearPreference
             android:key="unlock_set_or_change"
             android:title="@string/unlock_set_unlock_launch_picker_title"
             android:summary="@string/unlock_set_unlock_mode_password"

res/xml/security_settings_pattern.xml

@@ -22,7 +22,7 @@
         android:key="security_category"
         android:title="@string/lock_settings_title">
 
-        <com.android.settings.GearPreference
+        <com.android.settings.widget.GearPreference
             android:key="unlock_set_or_change"
             android:title="@string/unlock_set_unlock_launch_picker_title"
             android:summary="@string/unlock_set_unlock_mode_pattern"

res/xml/security_settings_pin.xml

@@ -22,7 +22,7 @@
         android:key="security_category"
         android:title="@string/lock_settings_title">
 
-        <com.android.settings.GearPreference
+        <com.android.settings.widget.GearPreference
             android:key="unlock_set_or_change"
             android:title="@string/unlock_set_unlock_launch_picker_title"
             android:summary="@string/unlock_set_unlock_mode_pin"

src/com/android/settings/SecuritySettings.java

@@ -68,9 +68,9 @@ import com.android.settings.search.Indexable;
 import com.android.settings.search.SearchIndexableRaw;
 import com.android.settings.security.SecurityFeatureProvider;
 import com.android.settings.trustagent.TrustAgentManager;
+import com.android.settings.widget.GearPreference;
 import com.android.settingslib.RestrictedLockUtils;
 import com.android.settingslib.RestrictedPreference;
-import com.android.settingslib.RestrictedSwitchPreference;
 import com.android.settingslib.drawer.CategoryKey;
 import com.android.settingslib.drawer.DashboardCategory;
 import com.android.settingslib.drawer.Tile;

src/com/android/settings/vpn2/ManageablePreference.java

@@ -23,7 +23,7 @@ import android.os.UserManager;
 import android.text.TextUtils;
 import android.util.AttributeSet;
 
-import com.android.settings.GearPreference;
+import com.android.settings.widget.GearPreference;
 import com.android.settings.R;
 
 /**

src/com/android/settings/vpn2/VpnSettings.java

@@ -23,8 +23,8 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
-import android.net.ConnectivityManager.NetworkCallback;
 import android.net.ConnectivityManager;
+import android.net.ConnectivityManager.NetworkCallback;
 import android.net.IConnectivityManager;
 import android.net.Network;
 import android.net.NetworkCapabilities;
@@ -41,7 +41,6 @@ import android.security.Credentials;
 import android.security.KeyStore;
 import android.support.v7.preference.Preference;
 import android.support.v7.preference.PreferenceGroup;
-import android.support.v7.preference.PreferenceScreen;
 import android.util.ArrayMap;
 import android.util.ArraySet;
 import android.util.Log;
@@ -56,11 +55,12 @@ import com.android.internal.net.LegacyVpnInfo;
 import com.android.internal.net.VpnConfig;
 import com.android.internal.net.VpnProfile;
 import com.android.internal.util.ArrayUtils;
-import com.android.settings.GearPreference;
-import com.android.settings.GearPreference.OnGearClickListener;
 import com.android.settings.R;
 import com.android.settings.RestrictedSettingsFragment;
+import com.android.settings.widget.GearPreference;
+import com.android.settings.widget.GearPreference.OnGearClickListener;
 import com.android.settingslib.RestrictedLockUtils;
+
 import com.google.android.collect.Lists;
 
 import java.util.ArrayList;

src/com/android/settings/widget/GearPreference.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 The Android Open Source Project
+ * Copyright (C) 2017 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.
@@ -11,16 +11,17 @@
  * 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
+ * limitations under the License.
  */
 
-package com.android.settings;
+package com.android.settings.widget;
 
 import android.content.Context;
 import android.support.v7.preference.PreferenceViewHolder;
 import android.util.AttributeSet;
 import android.view.View;
 
+import com.android.settings.R;
 import com.android.settingslib.RestrictedPreference;
 
 /**