Added PASS opcode support to ApfGenerator for immediate return.

This commit adds support for the "PASS" opcode to ApfGenerator. This
opcode allows the apf_interpreter to return with PASS immediately,
skipping over subsequent instructions.

* design doc: go/apf-v6-proposal

Bug: 293811969
Test: TH
Change-Id: Iea861cc8ebb6e9be0fcda79ca964a4b8ec797114
2 files changed