Update string for Connected devices page.

- update Bluetooth summary text "Connected to" and "Not connected"
- update USB summary text "Charging" and "Supplying"
- update Printing summary to "... on" or "off

Change-Id: I39a809b560a5c6cc6a0e217315dfabb2c4d1a129
Fix: 36234108
Test: builds

src/com/android/settings/bluetooth/BluetoothSummaryUpdater.java

@@ -98,13 +98,13 @@ public final class BluetoothSummaryUpdater extends SummaryUpdater implements Blu
         }
         switch (mConnectionState) {
             case BluetoothAdapter.STATE_CONNECTED:
-                return mContext.getString(R.string.bluetooth_connected);
+                return mContext.getString(R.string.bluetooth_connected_summary);
             case BluetoothAdapter.STATE_CONNECTING:
                 return mContext.getString(R.string.bluetooth_connecting);
             case BluetoothAdapter.STATE_DISCONNECTING:
                 return mContext.getString(R.string.bluetooth_disconnecting);
             default:
-                return mContext.getString(R.string.bluetooth_disconnected);
+                return mContext.getString(R.string.disconnected);
         }
     }