sepolicy: fix VTS failure for SuspendSepolicyTests

Label the common parent wakeup path instead of each
individual wakeup source to avoid bloating the genfs
contexts.

Bug: 221174227
Test: run vts -m SuspendSepolicyTests
Change-Id: I38e3a349af04f83e63735ea7ca010cf634c2f1ab
1 file changed