添加多窗口支持与LogActivity独立任务栈

appbase/src/main/res/layout/activity_main2.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:orientation="vertical"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:gravity="center"
+	android:background="@android:color/white">
+
+	<TextView
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:text="Main2Activity"
+		android:textSize="24sp"
+		android:textColor="@color/gray_900"/>
+
+</LinearLayout>