hwc2: Fix VTS failure on setActiveConfig() testcase

New resolution mode being set as a part of next commit, if
getActiveConfig() is called before the next commit sdm provides
the old config that results in VTS failure. Hence return the pending
config instead of the current config.

Change-Id: I18660916dae1c9fc8b3390afed1b94d8448f5966
CRs-Fixed: 2211483
1 file changed