Rename unaccounted to unknown.

Change-Id: I8071c3046c69a5f513cfbec12bc0b8628194b30d
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 8cb1510..b42c88c 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -3604,7 +3604,7 @@
     <!-- Label for power consumed when Idle -->
     <string name="power_idle" product="default">Phone idle</string>
     <!-- Label for power that we aren't able to account for -->
-    <string name="power_unaccounted">Unaccounted</string>
+    <string name="power_unaccounted">Unknown</string>
     <!-- Label for power that we computed too much for -->
     <string name="power_overcounted">Over-counted</string>
 
@@ -3702,7 +3702,7 @@
     <string name="battery_desc_users">Battery used by user</string>
 
     <!-- [CHAR LIMIT=50] Description for unaccounted power use -->
-    <string name="battery_desc_unaccounted">Unaccounted power use</string>
+    <string name="battery_desc_unaccounted">Unknown power use</string>
     <!-- [CHAR LIMIT=50] Description for over-counted power use -->
     <string name="battery_desc_overcounted">Over-counted power use</string>
     <!-- Representation of a mAh value. [CHAR LIMIT=NONE] -->