新增获取输入法列表和显示选择输入法对话框功能

Signed-off-by: zhouyongfei <zhouyongfei@huawei.com>

frameworks/inputmethod_controller/include/input_method_controller.h

@@ -66,6 +66,8 @@ namespace MiscServices {
         void OnSelectionChange(std::u16string text, int start, int end);
         void OnConfigurationChange(Configuration info);
         bool dispatchKeyEvent(std::shared_ptr<MMI::KeyEvent> keyEvent);
+        void DisplayOptionalInputMethod();
+        std::vector<InputMethodProperty*> ListInputMethod();
     private:
         InputMethodController();
         ~InputMethodController();

frameworks/inputmethod_controller/include/input_method_system_ability_proxy.h

@@ -48,6 +48,7 @@ namespace MiscServices {
         int32_t Start(sptr<InputClientStub> &client);
         int32_t Stop(sptr<InputClientStub> &client);
 
+        virtual void displayOptionalInputMethod(MessageParcel& data) override;
         virtual int32_t getDisplayMode(int32_t retMode) override;
         virtual int32_t getKeyboardWindowHeight(int32_t retHeight) override;
         virtual int32_t getCurrentKeyboardType(KeyboardType *retType) override;