Remove redundant val from Icon#equals

We can rely on smart casting and don't need to use a separate val here.

Bug: NA
Test: existing tests pass
Flag: EXEMPT minor cleanup
Change-Id: I1b4fa593a5d28386511b7902b37d0866931c4a64
diff --git a/packages/SystemUI/src/com/android/systemui/common/shared/model/Icon.kt b/packages/SystemUI/src/com/android/systemui/common/shared/model/Icon.kt
index fa87b03..379b638 100644
--- a/packages/SystemUI/src/com/android/systemui/common/shared/model/Icon.kt
+++ b/packages/SystemUI/src/com/android/systemui/common/shared/model/Icon.kt
@@ -66,21 +66,23 @@
         }
 
         override fun equals(other: Any?): Boolean {
-            val that = other as? Loaded ?: return false
+            if (other !is Loaded) {
+                return false
+            }
 
             // If both icons provide a resId, only use package+resId for identification, so that
             // drawable copies or mutations of the same base resource are considered equal.
-            if (this.resId != null && that.resId != null) {
-                return this.resId == that.resId &&
-                    this.packageName == that.packageName &&
-                    this.contentDescription == that.contentDescription
+            if (this.resId != null && other.resId != null) {
+                return this.resId == other.resId &&
+                    this.packageName == other.packageName &&
+                    this.contentDescription == other.contentDescription
             }
 
             // Otherwise, compare everything.
-            return this.resId == that.resId &&
-                this.packageName == that.packageName &&
-                this.drawable == that.drawable &&
-                this.contentDescription == that.contentDescription
+            return this.resId == other.resId &&
+                this.packageName == other.packageName &&
+                this.drawable == other.drawable &&
+                this.contentDescription == other.contentDescription
         }
 
         override fun hashCode(): Int {