Apply new action button visual design

- Add some icon resources.
- Add icon for each button in action button preference.
- Update "Enable" and "Disable" string to "Install" and "uninstall".
- Remove unused string.
- Add divider between entity header and action buttons.

Test: visual, robotest
Fixes: 119203074
Bug: 116346008
Change-Id: Ib8d7aeb2943d39d257e977b84f165f002bf47559

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

@@ -53,6 +53,7 @@ public class BluetoothDetailsButtonsController extends BluetoothDetailsControlle
     protected void init(PreferenceScreen screen) {
         mActionButtons = ((ActionButtonPreference) screen.findPreference(getPreferenceKey()))
                 .setButton1Text(R.string.forget)
+                .setButton1Icon(R.drawable.ic_settings_delete)
                 .setButton1OnClickListener((view) -> onForgetButtonPressed())
                 .setButton1Positive(false)
                 .setButton1Enabled(true);
@@ -68,6 +69,7 @@ public class BluetoothDetailsButtonsController extends BluetoothDetailsControlle
             if (!mConnectButtonInitialized || !previouslyConnected) {
                 mActionButtons
                         .setButton2Text(R.string.bluetooth_device_context_disconnect)
+                        .setButton2Icon(R.drawable.ic_settings_close)
                         .setButton2OnClickListener(view -> mCachedDevice.disconnect())
                         .setButton2Positive(false);
                 mConnectButtonInitialized = true;
@@ -76,6 +78,7 @@ public class BluetoothDetailsButtonsController extends BluetoothDetailsControlle
             if (!mConnectButtonInitialized || previouslyConnected) {
                 mActionButtons
                         .setButton2Text(R.string.bluetooth_device_context_connect)
+                        // TODO (b/119646923) Icon is not ready.
                         .setButton2OnClickListener(
                                 view -> mCachedDevice.connect(true /* connectAllProfiles */))
                         .setButton2Positive(true);