Update vendor VibrationEffect to support scale factor

Update VendorEffect.aidl to support 2 continuous float scale parameters,
one that reflects the user intensity settings for that effect and a
second that is forwarded from the vendor vibrator controller service for
that vibration usage.

This allows vendors to apply the 2-tier scaling function to the
vibrations, one reflecting the user settings and a second reflecting the
vendor parameter sent to the platform based on the device current
state.

Bug: 345409060
Test: VtsHalVibratorTargetTest
Flag: EXEMPT HAL interface changes
Change-Id: Ic88f90fd0ff1eae8797a7fe7d84d5b11f6c2f6bf