Skip testSendVendorCmd on VSR Android U and below

The test is only supported on Android V and above.

Ignore-AOSP-First: Cherrypick of existing change in aosp
Flag: TEST_ONLY
Bug: 347616496
Bug: 357001690
Test: TH
(cherry picked from commit 5f0d7f89f0fb6be816c6ff40d0cf90c7575901f3)

Merged-In: I3529c05f445b303d3584270233e091acc25c28b3
Change-Id: I3529c05f445b303d3584270233e091acc25c28b3