adding Lab4_UILabs

labs/Lab4_UILabs/.gitignore

labs/Lab4_UILabs/Lab-UserInterface.pdf

labs/Lab4_UILabs/UILabs.mp4

labs/Lab4_UILabs/app/build.gradle

...st/java/course/labs/todomanager/tests/Test1_SubmitTest.kt

.../java/course/labs/todomanager/tests/Test2_DateTimeTest.kt

...st/java/course/labs/todomanager/tests/Test3_CancelTest.kt

...est/java/course/labs/todomanager/tests/Test4_ResetTest.kt

labs/Lab4_UILabs/app/src/androidTest/res/drawable/.gitignore

labs/Lab4_UILabs/app/src/main/AndroidManifest.xml

.../src/main/java/course/labs/todomanager/AddToDoActivity.kt

...abs/app/src/main/java/course/labs/todomanager/ToDoItem.kt

.../src/main/java/course/labs/todomanager/ToDoListAdapter.kt

.../main/java/course/labs/todomanager/ToDoManagerActivity.kt

...ab4_UILabs/app/src/main/res/drawable-hdpi/ic_launcher.png

...ab4_UILabs/app/src/main/res/drawable-ldpi/ic_launcher.png

...ab4_UILabs/app/src/main/res/drawable-mdpi/ic_launcher.png

...b4_UILabs/app/src/main/res/drawable-xhdpi/ic_launcher.png

labs/Lab4_UILabs/app/src/main/res/layout/add_todo.xml

labs/Lab4_UILabs/app/src/main/res/layout/footer_view.xml