tree e9d2593a04bb88ca1f6a124f2bbb752899c933e1
parent e655f77d0dc85a5ad942cbdc8301b57a4c56e42f
author Yigit Boyar <yboyar@google.com> 1593971285 -0700
committer Yigit Boyar <yboyar@google.com> 1593982137 -0700

Isolate access to ElementFilters

This CL attempts to isolate access to ElementFilters into extension
methods.
As part of it, I've also removed all access to ElementUtils except for
the extension files.

Unfortunately, the difference between declared methods / methods
including supers / instance methods is not super clear in our codebase.
I tried a best effort to group them in 3 sections but I'm not 100% sure
if this is correct.

Added an additional test for element extensions (probably needs to be
further extended).

Bug: 160323720
Test: existing test suite, ElementExtTest
Change-Id: I962758128d3123b4c120fe48630ad54202047833