Add Cancel button in Car Keyguard

Change-Id: I0c44f3583fe1dadade1e1b01229571ab7eb29643
Fixes: 74964857
Test:  Manually tested on Mojave
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardPINView.java b/packages/SystemUI/src/com/android/keyguard/KeyguardPINView.java
index c1cff9e..adb2460 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardPINView.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardPINView.java
@@ -107,6 +107,13 @@
                 new View[]{
                         null, mEcaView, null
                 }};
+
+        View cancelBtn = findViewById(R.id.cancel_button);
+        if (cancelBtn != null) {
+            cancelBtn.setOnClickListener(view -> {
+                mCallback.reset();
+            });
+        }
     }
 
     @Override