Add option to disable wakelock

app/src/main/res/values/strings.xml

@@ -23,6 +23,9 @@
   <string name="settings_buffer">Offline buffering</string>
   <string name="settings_buffer_off_summary">Buffering off</string>
   <string name="settings_buffer_on_summary">Buffering on</string>
+  <string name="settings_wakelock">Wake lock</string>
+  <string name="settings_wakelock_off_summary">Wake lock off</string>
+  <string name="settings_wakelock_on_summary">Wake lock on</string>
   <string name="settings_accuracy_title">Location accuracy</string>
   <string name="settings_accuracy_summary">Desired location accuracy</string>
   <string name="settings_accuracy_high">High</string>