Update "Time spent in app" to "Screen time"

Bug: 129266977
Test: manual
Change-Id: I2a26dfb8c36ba00a73c69b5e7a7333bf20a83224
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 11281c2..16c01a3 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -8830,7 +8830,7 @@
     <string name="app_usage_preference">App usage preferences</string>
 
     <!-- Link title to show stats about how much time user spent in an app [CHAR LIMIT=45] -->
-    <string name="time_spent_in_app_pref_title">Time spent in app</string>
+    <string name="time_spent_in_app_pref_title">Screen time</string>
 
     <!-- Description of the usage access setting [CHAR LIMIT=NONE] -->
     <string name="usage_access_description">Usage access allows an app to track what other apps you\u2019re using and how often, as well as your carrier, language settings, and other details.</string>