Cellular radio is turned off in power save mode on Wear. Change the
error message so that user knows how to make phone call in this case.

b/33261653

Change-Id: I1e3f51ef100ea62c291e334973ef3ae045b80182
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 34cdeb5..bcad6f7 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -979,7 +979,9 @@
     <string name="notification_network_selection_text">Selected network (<xliff:g id="operator_name">%s</xliff:g>) unavailable</string>
 
     <!-- In-call screen: call failure message displayed in an error dialog. [CHAR_LIMIT=NONE] -->
-    <string name="incall_error_power_off">Turn off airplane mode to make a call.</string>
+    <string name="incall_error_power_off" product="watch">Turn off airplane mode or battery saver mode to make a call.</string>
+    <!-- In-call screen: call failure message displayed in an error dialog. [CHAR_LIMIT=NONE] -->
+    <string name="incall_error_power_off" product="default">Turn off airplane mode to make a call.</string>
     <!-- In-call screen: call failure message displayed in an error dialog when in airplane mode, WFC is enabled, not wifi-only, and not connected to wireless networks. [CHAR_LIMIT=NONE] -->
     <string name="incall_error_power_off_wfc">Turn off airplane mode or connect to a wireless network to make a call.</string>
     <!-- In-call screen: call failure message displayed when the user attempts to make a non-emergency call while the phone is in emergency callback mode. -->