Merge "Refine battery saver footer string" into qt-qpr1-dev

    <string name="confirm_battery_saver">OK</string>

    <!-- [CHAR_LIMIT=NONE] Battery saver: Feature description, with a "learn more" link. -->

    <string name="battery_saver_description_with_learn_more">Battery Saver turns off or restricts background activity, some visual effects \u0026 other high-power features to extend battery life. <annotation id="url">Learn More</annotation></string>

    <string name="battery_saver_description_with_learn_more">To extend battery life, Battery Saver:\n&#183;Turns on Dark theme\n&#183;Turns off or restricts background activity, some visual effects, and other features like \u201cHey Google\u201d\n\n<annotation id="url">Learn more</annotation></string>

    <!-- [CHAR_LIMIT=NONE] Battery saver: Feature description, without a "learn more" link. -->

    <string name="battery_saver_description">Battery Saver turns off or restricts background activity, some visual effects \u0026 other high-power features to extend battery life.</string>

    <string name="battery_saver_description">To extend battery life, Battery Saver:\n&#183;Turns on Dark theme\n&#183;Turns off or restricts background activity, some visual effects, and other features like \u201cHey Google\u201d</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>