Replace uses of libcore.io.SizeOf with X.BYTES.

libcore.io.SizeOf is an internal API and is going away soon.

Note: The files touched by this CL have some other unused
imports which I did not touch. Therefore I had to use
"repo upload --no-verify" to upload this CL to gerrit.

Bug: 123174577
Test: Manually checked that this CL applies cleanly in internal
      master and that no other uses of SizeOf then remain in
      internal master's frameworks/base
Test: Treehugger
Change-Id: Ib29a195f3dda2f21ebbe2f7073e0af4dbb524b19