feat(lite): 优化弹出菜单样式

- 添加三角形边框图标
- 调整弹出菜单布局，增加三角形装饰
- 优化 EasyPopupWindow 类，移除冗余代码

Author: AndroidCoderPeng

lite/src/main/java/com/pengxh/androidx/lite/widget/EasyPopupWindow.java

@@ -32,9 +32,8 @@ public EasyPopupWindow(Context context) {
     public void set(List<MenuItem> menuItems, OnPopupWindowClickListener windowClickListener) {
         View contentView = getContentView();
         ListView listView = contentView.findViewById(R.id.listView);
+        final LayoutInflater inflater = LayoutInflater.from(contentView.getContext());
         listView.setAdapter(new BaseAdapter() {
-            private final LayoutInflater inflater = LayoutInflater.from(contentView.getContext());
-
             @Override
             public int getCount() {
                 return menuItems.size();

lite/src/main/res/drawable/border_triangle.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="20px"
+    android:height="20px"
+    android:viewportWidth="1024"
+    android:viewportHeight="1024">
+    <path
+        android:fillColor="#030B14"
+        android:pathData="M71.7,893.3l440.3,-762.7 440.3,762.7z" />
+</vector>

lite/src/main/res/layout/popup_menu_option.xml

@@ -1,16 +1,29 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:backgroundTint="#030B14"
-    app:cardCornerRadius="@dimen/lib_dp_5">
+    android:layout_height="wrap_content">
 
-    <ListView
-        android:id="@+id/listView"
+    <View
+        android:layout_width="@dimen/lib_dp_20"
+        android:layout_height="@dimen/lib_dp_20"
+        android:layout_alignParentEnd="true"
+        android:layout_marginEnd="@dimen/lib_dp_15"
+        android:background="@drawable/border_triangle" />
+
+    <androidx.cardview.widget.CardView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:divider="@drawable/popup_list_divider"
-        android:dividerHeight="@dimen/lib_px_1"
-        android:scrollbars="none" />
-</androidx.cardview.widget.CardView>
+        android:layout_marginTop="17dp"
+        android:backgroundTint="#030B14"
+        app:cardCornerRadius="@dimen/lib_dp_5">
+
+        <ListView
+            android:id="@+id/listView"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:divider="@drawable/popup_list_divider"
+            android:dividerHeight="@dimen/lib_px_1"
+            android:scrollbars="none" />
+    </androidx.cardview.widget.CardView>
+</RelativeLayout>