Fix ProgressCategory theming and layout

- add missing constructors for correct theming
- fix layout by adding missing paddingStart / paddingEnd

Change-Id: I52a511d326b760a47339b2b9dad349c9f825dbd2

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

@@ -292,7 +292,7 @@ public final class BluetoothSettings extends DeviceListPreferenceFragment implem
 
                 // Available devices category
                 if (mAvailableDevicesCategory == null) {
-                    mAvailableDevicesCategory = new BluetoothProgressCategory(getActivity(), null);
+                    mAvailableDevicesCategory = new BluetoothProgressCategory(getActivity());
                 } else {
                     mAvailableDevicesCategory.removeAll();
                 }