VTS: kselftest rtctest

Simplify RTC presence check

Exempt-From-Owner-Approval: smuckle@ is OOO

Bug: 166143014
Change-Id: I2bcbe6fa744889e4b698ea36c68ff98898455518
(cherry picked from commit 350ec5e167dbdbf2edf281a7dd9232e38af47a0c)
1 file changed