cherry-picking reverted previous commit

MovieList class was refactored with CATEGORY_LIST and MovieLsit MAP

unnecessary codes in tv package were all removed.
add default thumbnail image for MovieDetailsFragment
initial staring branch for codelab attendees. Doesn't include actual implementations for supporting multiscreen and only contains skeleton (dummy) methods.
Modify Notification Directory Simply
Merge commit 'd44aae8c474d386c4d0243cfd9dc1651f95f73db' into WearExampleDev

Conflicts:
	mobile/src/main/java/com/gdgkoreaandroid/multiscreencodelab/tv/CardPresenter.java
	mobile/src/main/java/com/gdgkoreaandroid/multiscreencodelab/tv/MovieBrowseFragment.java
	mobile/src/main/java/com/gdgkoreaandroid/multiscreencodelab/tv/MovieDetailsFragment.java
	mobile/src/main/java/com/gdgkoreaandroid/multiscreencodelab/tv/StringPresenter.java
	mobile/src/main/java/com/gdgkoreaandroid/multiscreencodelab/tv/TvMovieBrowseActivity.java
Merge skeleton to WearExample