composer: vts: send a frame after call setActiveConfig

setActiveConfig will take effect follow by a frame updated. To
make sure it takes effect, send a frame after setActiveConfig.

Bug: 150831726
Test: VtsHalGraphicsComposerV2_4TargetTest
Change-Id: Ib999e808ac1339d1cba9e25e9a57b681b055cc99
1 file changed