Add setEnable and setOnClickListener in ViewUtils

Bug: 142124172
Test: Manually
Change-Id: I8b8a21ef5b9333950baf38f12a286df0079c6c17
diff --git a/car-apps-common/src/com/android/car/apps/common/util/ViewUtils.java b/car-apps-common/src/com/android/car/apps/common/util/ViewUtils.java
index 5baf4be..b9c9333 100644
--- a/car-apps-common/src/com/android/car/apps/common/util/ViewUtils.java
+++ b/car-apps-common/src/com/android/car/apps/common/util/ViewUtils.java
@@ -116,4 +116,18 @@
             view.setText(text);
         }
     }
+
+    /** Sets the enabled state of the (optional) view. */
+    public static void setEnabled(@Nullable View view, boolean enabled) {
+        if (view != null) {
+            view.setEnabled(enabled);
+        }
+    }
+
+    /** Sets onClickListener for the (optional) view. */
+    public static void setOnClickListener(@Nullable View view, @Nullable View.OnClickListener l) {
+        if (view != null) {
+            view.setOnClickListener(l);
+        }
+    }
 }