Suppress key validation logs

If the validation of keylayouts / keycharmaps / keyconfigs succeeds, do
not log anything to reduce logspam. The "-q" argument was misplaced in
the original CL.

Bug: 35672363
Test: touch frameworks/base/data/keyboards/Vendor_045e_Product_028e.kl && m
Also, change the behaviour in tools/validatekeymaps/Main.cpp to always
ignore "-q", see that the logs come back.

Change-Id: I3cd2ef161942905c2d8ffce8fc93dd345868066d