Interval stats: added a new tab in TrackRecordingActivity that shows the intervals on live.

src/main/res/layout/intervals_recording.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    style="@style/StatsScrollView">
+
+    <LinearLayout
+        android:id="@+id/root_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:layout_marginBottom="16dp"
+        android:layout_marginLeft="8dp"
+        android:layout_marginRight="8dp" />
+
+</ScrollView>

src/main/res/values/strings.xml

@@ -432,6 +432,7 @@ limitations under the License.
     <!-- Track Detail -->
     <string name="track_detail_chart_tab">Chart</string>
     <string name="track_detail_stats_tab">Stats</string>
+    <string name="track_detail_intervals_tab">Intervals</string>
     <string name="track_detail_record_success">Now recording a new track</string>
     <string name="track_detail_resume_success">Now resuming the track</string>
     <!-- Track Edit -->