Remove unnecessary casts on calls to findViewById

Just frameworks/ this time. More paths to come.

Bug: 24137209
Test: make -j32
Change-Id: Iff27abd26fa43296ac2fff8f534fc6742d2ae80c
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/car/CarNavigationBarView.java b/packages/SystemUI/src/com/android/systemui/statusbar/car/CarNavigationBarView.java
index d530759..6cbbd6c 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/car/CarNavigationBarView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/car/CarNavigationBarView.java
@@ -40,8 +40,8 @@
 
     @Override
     public void onFinishInflate() {
-        mNavButtons = (LinearLayout) findViewById(R.id.nav_buttons);
-        mLightsOutButtons = (LinearLayout) findViewById(R.id.lights_out);
+        mNavButtons = findViewById(R.id.nav_buttons);
+        mLightsOutButtons = findViewById(R.id.lights_out);
     }
 
     public void addButton(CarNavigationButton button, CarNavigationButton lightsOutButton){