Enable configuration of the `android:excludeFromRecents` activity attribute.

(cherry picked from commit cfa81ff32a3b074bc284cda3790166385fa15918)

platform/android/export/export_plugin.cpp

@@ -846,6 +846,7 @@ void EditorExportPlatformAndroid::_fix_manifest(const Ref<EditorExportPreset> &p
 	bool backup_allowed = p_preset->get("user_data_backup/allow");
 	bool classify_as_game = p_preset->get("package/classify_as_game");
 	bool retain_data_on_uninstall = p_preset->get("package/retain_data_on_uninstall");
+	bool exclude_from_recents = p_preset->get("package/exclude_from_recents");
 
 	Vector<String> perms;
 	// Write permissions into the perms variable.
@@ -959,6 +960,10 @@ void EditorExportPlatformAndroid::_fix_manifest(const Ref<EditorExportPreset> &p
 						encode_uint32(screen_orientation, &p_manifest.write[iofs + 16]);
 					}
 
+					if (tname == "activity" && attrname == "excludeFromRecents") {
+						encode_uint32(exclude_from_recents, &p_manifest.write[iofs + 16]);
+					}
+
 					if (tname == "supports-screens") {
 						if (attrname == "smallScreens") {
 							encode_uint32(screen_support_small ? 0xFFFFFFFF : 0, &p_manifest.write[iofs + 16]);
@@ -1703,6 +1708,7 @@ void EditorExportPlatformAndroid::get_export_options(List<ExportOption> *r_optio
 	r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "package/signed"), true));
 	r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "package/classify_as_game"), true));
 	r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "package/retain_data_on_uninstall"), false));
+	r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "package/exclude_from_recents"), false));
 
 	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, launcher_icon_option, PROPERTY_HINT_FILE, "*.png"), ""));
 	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, launcher_adaptive_icon_foreground_option, PROPERTY_HINT_FILE, "*.png"), ""));

platform/android/export/gradle_export_util.cpp

@@ -253,8 +253,10 @@ String _get_activity_tag(const Ref<EditorExportPreset> &p_preset) {
 			OS::get_singleton()->get_screen_orientation_from_string(GLOBAL_GET("display/window/handheld/orientation")));
 	String manifest_activity_text = vformat(
 			"        <activity android:name=\"com.godot.game.GodotApp\" "
-			"tools:replace=\"android:screenOrientation\" "
+			"tools:replace=\"android:screenOrientation,android:excludeFromRecents\" "
+			"android:excludeFromRecents=\"%s\" "
 			"android:screenOrientation=\"%s\">\n",
+			bool_to_string(p_preset->get("package/exclude_from_recents")),
 			orientation);
 	if (uses_xr) {
 		manifest_activity_text += "            <meta-data tools:node=\"replace\" android:name=\"com.oculus.vr.focusaware\" android:value=\"true\" />\n";

platform/android/java/app/AndroidManifest.xml

@@ -48,6 +48,7 @@
             android:label="@string/godot_project_name_string"
             android:theme="@style/GodotAppSplashTheme"
             android:launchMode="singleTask"
+            android:excludeFromRecents="false"
             android:screenOrientation="landscape"
             android:configChanges="orientation|keyboardHidden|screenSize|smallestScreenSize|density|keyboard|navigation|screenLayout|uiMode"
             android:resizeableActivity="false"