Clear caches when an A11yDisplayProxy is registered.

This removes any cached instances of the display and its windows
that now belong to the proxy.

Test: atestAccessibilityDisplayProxyTest
Bug: 241429275
Change-Id: Ie81eb4cd99d3732eeb69f28d4987ce01e734fabf

services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java

@@ -1757,6 +1757,8 @@ public class AccessibilityManagerService extends IAccessibilityManager.Stub
             AccessibilityServiceConnection service = state.mBoundServices.get(i);
             service.notifyClearAccessibilityNodeInfoCache();
         }
+
+        mProxyManager.clearCacheLocked();
     }
 
     private void notifyMagnificationChangedLocked(int displayId, @NonNull Region region,
@@ -3700,6 +3702,10 @@ public class AccessibilityManagerService extends IAccessibilityManager.Stub
         mProxyManager.registerProxy(client, displayId, mContext,
                 sIdCounter++, mMainHandler, mSecurityPolicy, this, getTraceManager(),
                 mWindowManagerService, mA11yWindowManager);
+
+        synchronized (mLock) {
+            notifyClearAccessibilityCacheLocked();
+        }
         return true;
     }
 

services/accessibility/java/com/android/server/accessibility/ProxyManager.java

@@ -235,4 +235,15 @@ public class ProxyManager {
             }
         }
     }
+
+    /**
+     * Clears all proxy caches.
+     */
+    public void clearCacheLocked() {
+        for (int i = 0; i < mProxyA11yServiceConnections.size(); i++) {
+            final ProxyAccessibilityServiceConnection proxy =
+                    mProxyA11yServiceConnections.valueAt(i);
+            proxy.notifyClearAccessibilityNodeInfoCache();
+        }
+    }
 }