Squash frequency control capability for merged multi-vibrators when

missing frequency profile.

Some CTS tests for frequency data assume that it exists (i.e. crash when
it doesn't) when a device claims it hasFrequencyControl. Note that the
API is currently non-public.

Bug: 257032261
Test: atest VibratorTest
Change-Id: Id1c1ae555f42009cb394a6cef664624054b575ac