Revert "Lollipop sample 4.20 fixes"

This reverts commit abaa9b7d11bdef28ab54cdb074912120d559a36c.
Revert "FloatingActionButtonBasic Lollipop update"

This reverts commit aa0b2e37732940701b233ac1282482fb788b22ed.
Revert "Camera2Basic Lollipop update"

This reverts commit c0b536e402a68b4973a2e23a4a9243589fee145a.
Revert "Camera2Video Lollipop update"

This reverts commit 5fdc75512b958ee54608f83d291bd1d174ea6b01.
Revert "Camera2Basic readme update"

This reverts commit 93103e34488ba0e1f3e0bd716b32fa2354bf48df.
Revert "CardView readme update"

This reverts commit f7137070382a29b5daeb2d6b5269fbdeff9ba05d.
Revert "L Readme clarification updates"

This reverts commit e215df0a5cac8cb4fd040f2aca3f7c2250b25a90.
Revert "JobScheduler Lollipop update"

This reverts commit 65f5b792b2a4c311c5f0900235cea8a3432424f4.