Added Data Saver Mode description.

    <!-- [CHAR_LIMIT=NONE] Battery saver: Feature description -->

    <string name="battery_saver_description">To help improve battery life, battery saver reduces your device’s performance and limits vibration, location services, and most background data. Email, messaging, and other apps that rely on syncing may not update unless you open them.\n\nBattery saver turns off automatically when your device is charging.</string>

    <!-- [CHAR_LIMIT=NONE] Data saver: Feature description -->

    <string name="data_saver_description">To help reduce data usage, Data Saver prevents some apps from sending or receiving data in the background. An app you’re currently using can access data, but may do so less frequently. This may mean, for example, that images don’t display until you tap them.</string>

    <!-- Zen mode condition - summary: time duration in minutes. [CHAR LIMIT=NONE] -->

    <plurals name="zen_mode_duration_minutes_summary">

        <item quantity="one">For one minute (until <xliff:g id="formattedTime" example="10:00 PM">%2$s</xliff:g>)</item>

  <java-symbol type="dimen" name="timepicker_text_size_normal" />

  <java-symbol type="dimen" name="timepicker_text_size_inner" />

  <java-symbol type="string" name="battery_saver_description" />

  <java-symbol type="string" name="data_saver_description" />

  <java-symbol type="string" name="zen_mode_forever" />

  <java-symbol type="string" name="zen_mode_forever_dnd" />

  <java-symbol type="string" name="zen_mode_rule_name_combination" />