[Autofill Framework] Add log on how many views are filtered because they
are not in current session

Bug: b/345570331
Test: atest CtsAutoFillServiceTestCases
Change-Id: I058e5e98fbd5df0ee753fe8f8ec39e3798b8092f
diff --git a/services/autofill/java/com/android/server/autofill/PresentationStatsEventLogger.java b/services/autofill/java/com/android/server/autofill/PresentationStatsEventLogger.java
index aa76200..35e5ceb 100644
--- a/services/autofill/java/com/android/server/autofill/PresentationStatsEventLogger.java
+++ b/services/autofill/java/com/android/server/autofill/PresentationStatsEventLogger.java
@@ -641,6 +641,15 @@
     }
 
     /**
+     * Set how many views are filtered from fill because they are not in current session
+     */
+    public void maybeSetFilteredFillableViewsCount(int filteredViewsCount) {
+        mEventInternal.ifPresent(event -> {
+            event.mFilteredFillabaleViewCount = filteredViewsCount;
+        });
+    }
+
+    /**
      * Set views_filled_failure_count using failure count as long as mEventInternal
      * presents.
      */
@@ -728,6 +737,7 @@
                     + " mAppPackageUid=" + mCallingAppUid
                     + " mIsCredentialRequest=" + event.mIsCredentialRequest
                     + " mWebviewRequestedCredential=" + event.mWebviewRequestedCredential
+                    + " mFilteredFillabaleViewCount=" + event.mFilteredFillabaleViewCount
                     + " mViewFillableTotalCount=" + event.mViewFillableTotalCount
                     + " mViewFillFailureCount=" + event.mViewFillFailureCount
                     + " mFocusedId=" + event.mFocusedId
@@ -784,6 +794,7 @@
                 mCallingAppUid,
                 event.mIsCredentialRequest,
                 event.mWebviewRequestedCredential,
+                event.mFilteredFillabaleViewCount,
                 event.mViewFillableTotalCount,
                 event.mViewFillFailureCount,
                 event.mFocusedId,
@@ -832,6 +843,7 @@
         int mFieldClassificationRequestId = DEFAULT_VALUE_INT;
         boolean mIsCredentialRequest = false;
         boolean mWebviewRequestedCredential = false;
+        int mFilteredFillabaleViewCount = DEFAULT_VALUE_INT;
         int mViewFillableTotalCount = DEFAULT_VALUE_INT;
         int mViewFillFailureCount = DEFAULT_VALUE_INT;
         int mFocusedId = DEFAULT_VALUE_INT;
diff --git a/services/autofill/java/com/android/server/autofill/Session.java b/services/autofill/java/com/android/server/autofill/Session.java
index aa67ffe..54c3886 100644
--- a/services/autofill/java/com/android/server/autofill/Session.java
+++ b/services/autofill/java/com/android/server/autofill/Session.java
@@ -6603,6 +6603,8 @@
                 boolean waitingDatasetAuth = false;
                 boolean hideHighlight = (entryCount == 1
                         && dataset.getFieldIds().get(0).equals(mCurrentViewId));
+                // Count how many views are filtered because they are not in current session
+                int numOfViewsFiltered = 0;
                 for (int i = 0; i < entryCount; i++) {
                     if (dataset.getFieldValues().get(i) == null) {
                         continue;
@@ -6615,6 +6617,7 @@
                             Slog.v(TAG, "Skipping filling view: " +
                                     viewId + " as it isn't part of the current session: " + id);
                         }
+                        numOfViewsFiltered += 1;
                         continue;
                     }
                     ids.add(viewId);
@@ -6628,6 +6631,8 @@
                         viewState.resetState(ViewState.STATE_WAITING_DATASET_AUTH);
                     }
                 }
+                mPresentationStatsEventLogger.maybeSetFilteredFillableViewsCount(
+                        numOfViewsFiltered);
                 if (!ids.isEmpty()) {
                     if (waitingDatasetAuth) {
                         mUi.hideFillUi(this);