Don't panic when a map is included twice

If a map was included twice, we had side effects when skipping the extra
inclusion.

Bug: 340659219
Test: manual, TH
Merged-In: I90c55a800ecad932f8f67cf6f9f60dba571f7c48
Change-Id: I90c55a800ecad932f8f67cf6f9f60dba571f7c48