Battery Saver capitilized in tile

When the phone is in battery saver mode, the "Battery Saver" secondary
label should be capitalized

Test: manual

Fixes: 145694753
Change-Id: Ia88547aa05ad441b07da3044e7148e1a918c28b5
diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index 69f661e..72c0ba8 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -893,7 +893,7 @@
     <!-- QuickSettings: Label for the toggle to activate dark theme (A.K.A Dark Mode). [CHAR LIMIT=20] -->
     <string name="quick_settings_ui_mode_night_label">Dark theme</string>
     <!-- QuickSettings: Secondary text for the dark theme tile when enabled by battery saver. [CHAR LIMIT=20] -->
-    <string name="quick_settings_dark_mode_secondary_label_battery_saver">Battery saver</string>
+    <string name="quick_settings_dark_mode_secondary_label_battery_saver">Battery Saver</string>
     <!-- QuickSettings: Secondary text for when the Dark Mode will be enabled at sunset. [CHAR LIMIT=20] -->
     <string name="quick_settings_dark_mode_secondary_label_on_at_sunset">On at sunset</string>
     <!-- QuickSettings: Secondary text for when the Dark Mode will be on until sunrise. [CHAR LIMIT=20] -->