Shorten the dark theme effect description in Modes Settings

Fixes: 367214085
Test: N/A
Flag: android.app.modes_ui
Change-Id: I598aab9a98e44cb78a8e486df135a55da4d8e8fc
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 82c1e61..06b48a6 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -8246,8 +8246,7 @@
     <!-- Do not disturb: device effect option, not first in list [CHAR LIMIT=80] -->
     <string name="mode_dark_theme_title_secondary_list">enable dark theme</string>
     <!-- Do not disturb: device effect summary [CHAR LIMIT=NONE] -->
-    <string name="mode_dark_theme_summary">Switch the OS and apps to prefer light text on a dark
-        background, which may be easier on the eyes and confers significant battery savings on some devices</string>
+    <string name="mode_dark_theme_summary">Switch the device theme to use a dark background, which is easier on the eyes</string>
     <!-- [CHAR LIMIT=NONE] Zen mode settings: Summary for sound interruption settings -->
     <string name="mode_display_settings_summary">
         {count, plural, offset:2