Having consistent import order will reduce chance of merge
conflict between internal and external master
Test: rebuild
Change-Id: I0b1a170967ddcce7f388603fd521f6ed1eeba30b
Bug: 64124736
Test: I just played with it with TalkBack on. The crash
was difficult to reproduce before, and I can't make it
fail now. I believe I got it.
Change-Id: I17ffe8d83e21e716d1c0cadea52afcf09bff6e97
Helper should have same lifecycle as the class itself. Also rearranges
class to match up with standard Android class organization.
Bug: 27674946
Change-Id: Ib2ab1e367d4ef1757321375bbb7e4c5f0dc8f46c