Merge "Update app usage page footer string" into sc-dev

    <string name="manager_battery_usage_footer">Changing how an app uses your battery can affect its performance.</string>

    <!-- Footer for the manage battery usage page when app is limited to specific option (e.g This app requires restricted battery usage) [CHAR_LIMIT=NONE] -->

    <string name="manager_battery_usage_footer_limited">This app requires <xliff:g id="state" example="restricted">%1$s</xliff:g> battery usage.</string>

    <!-- The state when app is limited to unrestricted option only (e.g This app requires unrestricted battery usage) [CHAR_LIMIT=40] -->

    <string name="manager_battery_usage_unrestricted_only">unrestricted</string>

    <!-- The state when app is limited to optimized option only (e.g This app requires optimized battery usage) [CHAR_LIMIT=40] -->

    <string name="manager_battery_usage_optimized_only">optimized</string>

    <!-- Title for the screen usage in power use UI [CHAR_LIMIT=60] -->

    <string name="device_screen_usage">Screen usage since full charge</string>

            final long foregroundTimeMs = bundle.getLong(EXTRA_FOREGROUND_TIME);

            final long backgroundTimeMs = bundle.getLong(EXTRA_BACKGROUND_TIME);

            final String slotTime = bundle.getString(EXTRA_SLOT_TIME, null);

            //TODO(b/178197718) Update layout to support multiple lines

            controller.setSummary(getAppActiveTime(foregroundTimeMs, backgroundTimeMs, slotTime));

        }

    void initPreferenceForTriState(Context context) {

        final String stateString;

        final String footerString;

        //TODO(b/178197718) Update strings

        if (!mBatteryOptimizeUtils.isValidPackageName()) {

            //Present optimized only string when the package name is invalid.

            stateString = context.getString(R.string.manager_battery_usage_optimized_title);

            stateString = context.getString(R.string.manager_battery_usage_optimized_only);

            footerString = context.getString(

                    R.string.manager_battery_usage_footer_limited, stateString);

        } else if (mBatteryOptimizeUtils.isSystemOrDefaultApp()) {

            //Present unrestricted only string when the package is system or default active app.

            stateString = context.getString(R.string.manager_battery_usage_unrestricted_title);

            stateString = context.getString(R.string.manager_battery_usage_unrestricted_only);

            footerString = context.getString(

                    R.string.manager_battery_usage_footer_limited, stateString);

        } else {