firmware: Fix compilation due to lack of assert.h am: 78c7d3a84e am: b7bea74b83 am: 77bbc5c2f2 am: 80ef23782f

Original change: https://android-review.googlesource.com/c/device/google/contexthub/+/1960337

Change-Id: I6794a7f902486436c8b13de7f1680be18df078e2