Update android-info.txt in dist directory.

We update android-info.txt if we don't need product.img to flash.
In that case the updated one must be provided to dist directory for
flashstation to flash correctly.

Bug: 120578242
Test: Use flashstation to flash the mixed build target
Change-Id: I43b9d5cb3352a8c56221a325197c189c22a3d6f6