Android11去掉【设置】--【已连接的设备】--【连接偏好设置】里的投射菜单条目，具体如下：

java">commit 0c0583e6ddcdea21ec02db291d9a07d90f10aa59
Author: wzh <wzh@incartech.com>
Date:   Wed Jul 21 16:37:13 2021 +0800

    去掉投射菜单
    
    Change-Id: Id7f205cdf9b8e17f836eb697195ab39d1e3a6b8c

diff --git a/AndroidManifest.xml b/AndroidManifest.xml
old mode 100644
new mode 100755
index c22eab0..fe351f9
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -2149,7 +2149,7 @@
                 android:value="true" />
         </activity>
 
-        <activity
+        <!-- activity
             android:name="Settings$WifiDisplaySettingsActivity"
             android:label="@string/wifi_display_settings_title"
             android:icon="@drawable/ic_cast_24dp">
@@ -2159,7 +2159,7 @@
             </intent-filter>
             <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
                 android:value="com.android.settings.wfd.WifiDisplaySettings" />
-        </activity>
+        </activity -->
 
         <activity android:name="Settings$TestingSettingsActivity" android:label="@string/testing">
             <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
diff --git a/res/xml/connected_devices_advanced.xml b/res/xml/connected_devices_advanced.xml
old mode 100644
new mode 100755
index 3ff7d99..eba8849
--- a/res/xml/connected_devices_advanced.xml
+++ b/res/xml/connected_devices_advanced.xml
@@ -35,14 +35,14 @@
         settings:searchable="false"
         settings:controller="com.android.settings.connecteddevice.NfcAndPaymentFragmentController"/>
 
-    <Preference
+    <!-- Preference
         android:fragment="com.android.settings.wfd.WifiDisplaySettings"
         android:key="wifi_display_settings"
         android:title="@string/wifi_display_settings_title"
         android:icon="@drawable/ic_cast_24dp"
         android:order="-6"
         settings:controller="com.android.settings.wfd.WifiDisplayPreferenceController"
-        settings:keywords="@string/keywords_wifi_display_settings"/>
+        settings:keywords="@string/keywords_wifi_display_settings"/ -->
 
     <com.android.settingslib.RestrictedPreference
         android:fragment="com.android.settings.nfc.AndroidBeam"
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
old mode 100644
new mode 100755
index e94e647..32cd096
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -131,7 +131,7 @@ public class Settings extends SettingsActivity {
     public static class SavedAccessPointsSettingsActivity extends SettingsActivity { /* empty */ }
     public static class TextToSpeechSettingsActivity extends SettingsActivity { /* empty */ }
     public static class AndroidBeamSettingsActivity extends SettingsActivity { /* empty */ }
-    public static class WifiDisplaySettingsActivity extends SettingsActivity { /* empty */ }
+    //public static class WifiDisplaySettingsActivity extends SettingsActivity { /* empty */ }
     public static class DreamSettingsActivity extends SettingsActivity { /* empty */ }
     public static class NotificationStationActivity extends SettingsActivity { /* empty */ }
     public static class UserSettingsActivity extends SettingsActivity { /* empty */ }
diff --git a/src/com/android/settings/SettingsActivity.java b/src/com/android/settings/SettingsActivity.java
old mode 100644
new mode 100755
index 76739f0..63b3a8a
--- a/src/com/android/settings/SettingsActivity.java
+++ b/src/com/android/settings/SettingsActivity.java
@@ -649,10 +649,10 @@ public class SettingsActivity extends SettingsBaseActivity
                 showDev, isAdmin)
                 || somethingChanged;
 
-        somethingChanged = setTileEnabled(changedList, new ComponentName(packageName,
+        /*somethingChanged = setTileEnabled(changedList, new ComponentName(packageName,
                         Settings.WifiDisplaySettingsActivity.class.getName()),
                 WifiDisplaySettings.isAvailable(this), isAdmin)
-                || somethingChanged;
+                || somethingChanged;*/
 
         somethingChanged = setTileEnabled(changedList, new ComponentName(packageName,
                         Settings.ScreenshotSettingsActivity.class.getName()),
diff --git a/src/com/android/settings/core/gateway/SettingsGateway.java b/src/com/android/settings/core/gateway/SettingsGateway.java
old mode 100644
new mode 100755
index 77adbf0..8875ca7
--- a/src/com/android/settings/core/gateway/SettingsGateway.java
+++ b/src/com/android/settings/core/gateway/SettingsGateway.java
@@ -338,7 +338,7 @@ public class SettingsGateway {
             Settings.DataUsageSummaryActivity.class.getName(),
             // Home page > Connected devices
             Settings.BluetoothSettingsActivity.class.getName(),
-            Settings.WifiDisplaySettingsActivity.class.getName(),
+            //Settings.WifiDisplaySettingsActivity.class.getName(),
             Settings.PrintSettingsActivity.class.getName(),
             // Home page > Apps & Notifications
             Settings.UserSettingsActivity.class.getName(),