Switch to clang-r346389.

* Add -fno-sanitize=implicit-integer-sign-change when
  there is any integer related sanitizer, and this check
  is not explicitly specified.
  Android core does not boot with this new sanitizer yet.
* Filter out -fno-sanitize=implicit-integer-sign-change
  from tooling flags.

Bug: 119329758
Bug: 119557795
Test: make checkbuild, boot, go/clang-r346389-testing
Change-Id: I709de569cb73d070fc4958e2b4387f4041bc5438