msm: rndis: move resource manager setup to connect/disconnect events

This change moves the IPA Resource Manager setup API to
connect and disconnect events.
it is done in order to have the same behavior as of ECM_IPA.
The same behavior should apply to both ECM_IPA and RNDIS_IPA due
to the fact that they use the same API of IPA Resource Manager
which has internal dependencies of these APIs timing, thus, the ECM setup
and RNDIS setup should happen at the same sequence.

Change-Id: Iffb3c5e1e3be9e7c93533980a0c8122211a52cfd
Signed-off-by: Talel Shenhar <tatias@codeaurora.org>