ART: Create BoundType for CheckCast early

ReferenceTypePropagation creates a BoundType for each CheckCast and
replaces all dominated uses of the casted object with it. This does
not include Phi uses on the boundary of the dominated scope, reducing
typing precision. This patch creates the BoundType in Builder, causing
SsaBuilder to replace uses of the object automatically.

Bug: 26081304

Change-Id: I083979155cccb348071ff58cb9060a896ed7d2ac
9 files changed