Add TrunkStable.bp

All the branches except udc-mainline-prod have TrunkStable.bp.
So this CL adds this file to avoid conflicts.
TrunkStable.bp is not included by Android.bp in udc-mainline-prod.
So, this CL is a no-op.

AOSP-first: TrunkStable.bp exists in aosp
Test: TH
Merged-In: Ib69d2fdc1d73b36a08a3d8ae1f2c45b2bcffae64

Change-Id: Ib3fe0774086ab5531f0e4d776da23667d32daad4
1 file changed