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/keyguard/KeyguardPINView.java b/packages/SystemUI/src/com/android/keyguard/KeyguardPINView.java
index 590d8d5..c1cff9e 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardPINView.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardPINView.java
@@ -79,11 +79,11 @@
     protected void onFinishInflate() {
         super.onFinishInflate();
 
-        mContainer = (ViewGroup) findViewById(R.id.container);
-        mRow0 = (ViewGroup) findViewById(R.id.row0);
-        mRow1 = (ViewGroup) findViewById(R.id.row1);
-        mRow2 = (ViewGroup) findViewById(R.id.row2);
-        mRow3 = (ViewGroup) findViewById(R.id.row3);
+        mContainer = findViewById(R.id.container);
+        mRow0 = findViewById(R.id.row0);
+        mRow1 = findViewById(R.id.row1);
+        mRow2 = findViewById(R.id.row2);
+        mRow3 = findViewById(R.id.row3);
         mDivider = findViewById(R.id.divider);
         mViews = new View[][]{
                 new View[]{