feat: 添加自动填充阻止功能，优化 WebView 表单数据处理

android/app/src/main/kotlin/io/openim/flutter/openim/MainActivity.kt

@@ -16,6 +16,7 @@ import android.util.Base64
 import android.util.Log
 import android.view.View
 import android.view.ViewGroup
+import android.view.autofill.AutofillManager
 import android.webkit.CookieManager
 import android.webkit.WebStorage
 import android.webkit.WebView
@@ -59,6 +60,13 @@ class MainActivity : FlutterActivity() {
         disableAutofillForCurrentWindow()
     }
 
+    override fun onWindowFocusChanged(hasFocus: Boolean) {
+        super.onWindowFocusChanged(hasFocus)
+        if (hasFocus) {
+            disableAutofillForCurrentWindow()
+        }
+    }
+
     override fun onDestroy() {
         pendingCaptureConfirmationDialog?.dismiss()
         pendingCaptureConfirmationDialog = null
@@ -405,21 +413,18 @@ class MainActivity : FlutterActivity() {
     }
 
     private fun installAutofillBlocker() {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
-            return
-        }
-
         disableAutofillForCurrentWindow()
         window.decorView.viewTreeObserver.addOnGlobalLayoutListener {
             disableAutofillForCurrentWindow()
         }
+        window.decorView.post {
+            disableAutofillForCurrentWindow()
+        }
     }
 
     private fun disableAutofillForCurrentWindow() {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
-            return
-        }
         disableAutofill(window.decorView)
+        cancelAutofillSession()
     }
 
     private fun disableAutofill(view: View) {
@@ -427,6 +432,10 @@ class MainActivity : FlutterActivity() {
             view.importantForAutofill = View.IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS
         }
 
+        if (view is WebView) {
+            disableWebViewAutofill(view)
+        }
+
         if (view is ViewGroup) {
             for (index in 0 until view.childCount) {
                 disableAutofill(view.getChildAt(index))
@@ -434,6 +443,35 @@ class MainActivity : FlutterActivity() {
         }
     }
 
+    private fun disableWebViewAutofill(webView: WebView) {
+        webView.settings.setSaveFormData(false)
+        webView.clearFormData()
+        webView.isSaveEnabled = false
+        webView.setSaveFromParentEnabled(false)
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            webView.importantForAutofill =
+                View.IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS
+        }
+
+        webView.post {
+            webView.settings.setSaveFormData(false)
+            webView.clearFormData()
+            webView.isSaveEnabled = false
+            webView.setSaveFromParentEnabled(false)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                webView.importantForAutofill =
+                    View.IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS
+            }
+        }
+    }
+
+    private fun cancelAutofillSession() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            getSystemService(AutofillManager::class.java)?.cancel()
+        }
+    }
+
     private fun normalizeMimeTypes(acceptTypes: List<String>): List<String> {
         val mimeTypes = linkedSetOf<String>()
         acceptTypes