Fix VENDOR_MASK constant

It's not supposed to be sign-extended as that blocks off the entire
28-64 bit range instead of the 28-31 bit range as indicated in the
comment

As this value is correct in HIDL and in the docs, do a history
re-write of the AIDL value to match the intended (and previous)
values.

Test: make
Bug: 323484008
Change-Id: I0b373576a366c853c87109a9b24ec9f8d9cbdb4d