Implement automatic restart of MyTracks on phone reboot.

In addition fix the following issues/add functionality:
0) Introduce MyTracksReceiver for listening on broadcast messages
1) Remove unnecessary call to VerifyChecker to avoid 403.
2) Clean up TrackRecordingService by adding private methods for common functionality
3) Fix a bug related to not canceling a timer after service was stopped
4) Add a new preference item to control behavior of new functionality
5) Add a unit test for the service (still need to figure out one issue with mocking content resolver).

MyTracks/res/drawable/btn_arrow_left.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2010 Google Inc.
+
+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.
+-->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+  <item android:state_window_focused="false"
+      android:drawable="@drawable/btn_arrow_left_default" />
+
+  <item android:state_pressed="true"
+      android:drawable="@drawable/btn_arrow_left_press" />
+
+  <item android:drawable="@drawable/btn_arrow_left_default" />
+
+</selector>

MyTracks/res/drawable/btn_arrow_right.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2010 Google Inc.
+
+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.
+-->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+  <item android:state_window_focused="false"
+      android:drawable="@drawable/btn_arrow_right_default" />
+
+  <item android:state_pressed="true"
+      android:drawable="@drawable/btn_arrow_right_press" />
+
+  <item android:drawable="@drawable/btn_arrow_right_default" />
+
+</selector>

MyTracks/res/drawable/list_bar.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2010 Google Inc.
+
+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.
+-->
+<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+  <gradient android:startColor="#ff999999" android:endColor="#ff777777" android:angle="270"/>
+</shape>