Improve bound analysis on constant range.

Rationale:
A low hanging fruit basedon the first CL
that addressed b/70688025 (when the method
is inlined, BCE did not kick in due to
missing the now constant range).

Bug: b/70688025

Test: test-art-host test-art-target
Change-Id: Ic317d5a0920e654b5158694a1dfa1ea359e0a839