Add full unlock gesture to FalsingManager

When FalsingManager.onBouncerShown() is called, this will cause the
MotionEvents to no longer be added to the HumanInteractionClassifier,
which means that the classifier will have to work with only partial
gesture, and will not be able to make a proper decision on unlock. This
would cause many valid unlock gestures to fail.

Instead, record the state of the bouncer visibility at the beginning of
each MotionEvent (on ACTION_DOWN). Then, if the bouncer was not visible,
add the full gesture to the HumanInteractionClassifier.

Test: recorded a valid unlock event with inputstudio, then replayed it
with and without the change. Consistently succeeded with unlock with
this patch, and failed many times (but not always) before the change.
Bug: 71762354

Change-Id: Ib93f21bff19c36aa296ddf6ed9a0a3e879eeb69c
diff --git a/packages/SystemUI/src/com/android/systemui/classifier/FalsingManager.java b/packages/SystemUI/src/com/android/systemui/classifier/FalsingManager.java
index a265a5e..0ca0a11 100644
--- a/packages/SystemUI/src/com/android/systemui/classifier/FalsingManager.java
+++ b/packages/SystemUI/src/com/android/systemui/classifier/FalsingManager.java
@@ -74,6 +74,7 @@
 
     private boolean mEnforceBouncer = false;
     private boolean mBouncerOn = false;
+    private boolean mBouncerOffOnDown = false;
     private boolean mSessionActive = false;
     private boolean mIsTouchScreen = true;
     private int mState = StatusBarState.SHADE;
@@ -459,10 +460,19 @@
     public void onTouchEvent(MotionEvent event, int width, int height) {
         if (event.getAction() == MotionEvent.ACTION_DOWN) {
             mIsTouchScreen = event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN);
+            // If the bouncer was not shown during the down event,
+            // we want the entire gesture going to HumanInteractionClassifier
+            mBouncerOffOnDown = !mBouncerOn;
         }
-        if (mSessionActive && !mBouncerOn) {
-            mDataCollector.onTouchEvent(event, width, height);
-            mHumanInteractionClassifier.onTouchEvent(event);
+        if (mSessionActive) {
+            if (!mBouncerOn) {
+                // In case bouncer is "visible", but onFullyShown has not yet been called,
+                // avoid adding the event to DataCollector
+                mDataCollector.onTouchEvent(event, width, height);
+            }
+            if (mBouncerOffOnDown) {
+                mHumanInteractionClassifier.onTouchEvent(event);
+            }
         }
     }