Settings: change CV_PREFERRED_INTENSITY valid range

Change range of CV_PREFERRED_INTENSITY setting from hard-coded (0-10) to relative (0.0-1.0)

Bug: 402460239
Flag: EXEMPT no API change
Test: test that new build with old setting using previous value range does not break the build with new range
Change-Id: I2586b7fd1674dba92bcaff176e26884213d82046