VTS: check ro.vendor.api_level instead of ro.board.(first_)api_level

Bug: 327526153
Test: atest VtsHalMediaC2V1_0TargetMasterTest
(cherry picked from https://android-review.googlesource.com/q/commit:04c8943004913bb606d959b7f796477016a3b1e0)
Merged-In: I130134b791bf9b3ebe1a9687c921dbbd5295e143
Change-Id: I130134b791bf9b3ebe1a9687c921dbbd5295e143
1 file changed