ART: Generate chained compare-and-branch for short switches

Refactor Mir2Lir to generate chained compare-and-branch sequences
for short switches on all architectures.

Bug: 16241558

(cherry picked from commit 48971b3242e5126bcd800cc9c68df64596b43d13)

Change-Id: I0bb3071b8676523e90e0258e9b0e3fd69c1237f4
12 files changed