Update strip.none's documentation

https://r.android.com/3460147 updated host modules to enable strip by
default, but unfortunately did not update the documentation. This CL
updates the documentation of `strip.none` to reflect the updated
implementation.

Test: documentation change
Bug: 390471378
Change-Id: I839dc5f2398f13a5c898008b4d850fef0ea4f092