Rild: Ril should try to write again to the socket EAGAIN error

In case of  EAGAIN error, the RIL should write to socket again after some
time.

Change-Id: Ia4c8d17b7c16040a49a4c607a1d1350ebbe7847c
CRs-Fixed: 285312
Merge "Rild: Ril should try to write again to the socket EAGAIN error"
Merge branch 'master' of https://android.googlesource.com/platform/hardware/ril into jb-4.2