Merge "Rename "Billing Cycle" to "App usage cycle"." into pi-dev

    <!-- Format for a summary describing the amount of data before the user is warned or limited [CHAR LIMIT=NONE] -->

    <string name="cell_warning_and_limit"><xliff:g name="amount" example="1 GB">%1$s</xliff:g> Data warning / <xliff:g name="amount" example="2 GB">%2$s</xliff:g> Data limit</string>

    <!-- Title of button and screen for billing cycle preferences [CHAR LIMIT=30 -->

    <string name="billing_cycle">Billing cycle</string>

    <!-- Title of button and screen for billing cycle preferences [CHAR LIMIT=30] -->

    <string name="billing_cycle">Data warning &amp; limit</string>

    <!-- Title of button for application usage cycle preferences [CHAR LIMIT=30] -->

    <string name="app_usage_cycle">App data usage cycle</string>

    <!-- Summary describing when the billing cycle for their phone carrier starts [CHAR LIMIT=NONE] -->

    <string name="billing_cycle_fragment_summary">Monthly on day <xliff:g name="day_of_month" example="17">%1$s</xliff:g></string>

    <Preference

        android:key="billing_cycle"

        android:title="@string/billing_cycle" />

        android:title="@string/app_usage_cycle" />

    <SwitchPreference

        android:key="set_data_warning"