Update app usage page footer string

- Use lower case string

Bug: 178197718
Test: make SettingsRoboTests
Change-Id: Id4111256bdab5f74e31fed6d015b96fe687a4c7b

res/values/strings.xml

@@ -5913,6 +5913,10 @@
     <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>

src/com/android/settings/fuelgauge/AdvancedPowerUsageDetail.java

@@ -297,7 +297,6 @@ public class AdvancedPowerUsageDetail extends DashboardFragment implements
             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));
         }
 
@@ -329,15 +328,15 @@ public class AdvancedPowerUsageDetail extends DashboardFragment implements
     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 {