Add support for eagerly calculating conflict tables

Will be used to put them in the image by having the compiler eagerly
calculate them.

Enabled for debug builds (non compiler). Support for having conflict
tables written in the image will come in the next CL.

Bug: 27906566

(cherry picked from commit 49b5cede)

Change-Id: Ia05cb31f85eacfeabe64a8caf9a0b3029114a749