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/tests/TransitionTests/src/com/android/transitiontests/ContactsExpansion.java b/tests/TransitionTests/src/com/android/transitiontests/ContactsExpansion.java
index f687da3..86ecf8e 100644
--- a/tests/TransitionTests/src/com/android/transitiontests/ContactsExpansion.java
+++ b/tests/TransitionTests/src/com/android/transitiontests/ContactsExpansion.java
@@ -49,7 +49,7 @@
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.contacts_list);
-        ViewGroup contactsContainer = (ViewGroup) findViewById(R.id.contactsContainer);
+        ViewGroup contactsContainer = findViewById(R.id.contactsContainer);
 
         int contactsIndex = 0;
         addContact(contactsContainer, contactsIndex, R.drawable.self_portrait_square_100);