Revert "Revert "Refactor writing type lookup tables into OAT""

OatWriter used to write type lookup tables through an mmap of the
DEX section of the OAT file. This approach would not work once the
DEX section is moved into the VDEX file, hence it was rewritten to
write the data through OutputStream.

This reverts commit b92ba629.

Test: m test-art-host
Bug: 30937355
Change-Id: Id923f2c8a4f9ce2a3834b9886b4358e1b379b83d