CipherTest: in ASN1 encoding for GCM, no value for tag size means 12

Bug: 26231099
Bug: 26234568
Bug: 29876633
Change-Id: I44c0c68f1e92caf6547c9e3b494ec5b82b8cff5f
(cherry picked from commit d3204de83ff89519bd2f7c5b3260e508936d58d2)
1 file changed