Change "Cell standby" to "Mobile network standby"

Bug: 37356060
Test: Build
Change-Id: I2c726a7f31ae37cf0a31b76e2a99d9c5735692fe
diff --git a/res/values/strings.xml b/res/values/strings.xml
index ae2eb0a..7f29943 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -4539,8 +4539,8 @@
     <string name="power_wifi">Wi\u2011Fi</string>
     <!-- Label for power consumed by Bluetooth -->
     <string name="power_bluetooth">Bluetooth</string>
-    <!-- Label for power consumed by Cell idle -->
-    <string name="power_cell">Cell standby</string>
+    <!-- Label for power consumed by Mobile network idle -->
+    <string name="power_cell">Mobile network standby</string>
     <!-- Label for power consumed by Calling -->
     <string name="power_phone">Voice calls</string>
     <!-- Label for power consumed when Idle -->