Update api-generator-22.9.4.

Regenerate api-generator-22.9.4 (which depends on asm-5.0.4
instead of asm-4.0) such that it also depends directly on just
Guava instead of also depending on com.android.tools:common.

Source: tools/base @ b2b7ff4eff1b3ea66e2c51edb15eec9d786b6381
(studio-master-dev)

(cherry-picked from commit 6bd0796506a29e662fafa8229e1694241e8812e3)

Change-Id: Ieb49a097683a025d2ee406ec3179ebc439d3791f