Use ContactContract.Phone instead of internal definition

PhoneColumns was just redundant, and only made it hard to find all usecases
of Phone.NORMALIZED_NUMBER.

Also makred GroupsTest as @MediumTest.  Some methods didn't have a size
annotations so they weren't executed as we always have to use the "-e size"
parameter.

Change-Id: I53160219e2ab6b2535cc8be61b07af6312bc92fc
4 files changed