libsnapshot_test: skip global setup on non-VAB devices.
On non-VAB devices, fake super image creation may fail because it
may not support f2fs file pinning.
Also changes global setup to a testing::Environment object because it is
the recommended way in gtest's guide. SnapshotTestEnvironement::TearDown
is automatically executed before RUN_ALL_TEST returns.
Test: vts_libsnapshot_test
Test: make IsVirtualAbEnabled() return false, then all tests are
skipped.
Bug: 162557082
Change-Id: I1382f9a4ddec146fa2d8cfb21ac66ca22a2e110f
(cherry picked from commit a7c00a0943411596fab0632bbbd52f3d7e2e68ba)
Merged-In: I1382f9a4ddec146fa2d8cfb21ac66ca22a2e110f
5 files changed