Add utility for to allow to overwrite on-device speech recognition
temporarily.

I had to define a new permission in order for it to work (which makes
sense, since we only want to allow shell to overwrite the temp service).

Test: adding CTS
Bug: 177915986
Change-Id: I3ac8f2366595f502b42c9ad93b331d0c0039d16c
7 files changed