binder: add another compat symbol

- Extend https://gerrit.omnirom.org/#/c/2324/
- Some old blobs, mainly LGE libs need this

Change-Id: Ia0370fecff24348aefa17aa7de2609535323e9b0
sensorservice: Fix init sequence for pre-1.1 API sensor HALs

The sensors API introduced a new flush() method that older binaries
won't have. For those, replace the firstFlush invocation with a
setDelay call since a lot of implementations interpreted that as
the initialization step.
We also don't want any kind of call to flush() to happen when it
isn't there, since it'll either hit a random OEM extension or
a memory address we really don't want to execute.

Change-Id: I26ce923fe385751fed7d1c483a53c074249f0620
merge changes from Omni 4.4 into local branch