Modify the check units flow so that it asks the user to pick either

metric or imperial. Metric is the default. Thus no longer need to
send the user to the 'Display' settings page.

MyTracksApiSample/res/layout/main.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_height="match_parent"
+    android:layout_width="match_parent"
+    android:orientation="vertical"
+    >
+  <Button android:id="@+id/start_recording_button"
+    android:layout_height="wrap_content"
+    android:layout_width="wrap_content"
+    android:text="@string/start_recording"
+    />
+  <Button android:id="@+id/stop_recording_button"
+    android:layout_height="wrap_content"
+    android:layout_width="wrap_content"
+    android:text="@string/stop_recording"
+    />
+  <Button android:id="@+id/add_waypoints_button"
+    android:layout_height="wrap_content"
+    android:layout_width="wrap_content"
+    android:text="@string/add_waypoints"
+    />
+  <TextView android:id="@+id/output"  
+    android:layout_height="wrap_content" 
+    android:layout_width="match_parent"
+    />
+</LinearLayout>

MyTracksApiSample/res/values/strings.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="add_waypoints">Add a waypoint to all the tracks</string>
+    <string name="app_name">MyTracksApiSample</string>
+    <string name="start_recording">Start recording</string>
+    <string name="stop_recording">Stop recording</string>
+</resources>