NetworkController: Hide signal strength icon when no SIM icon is shown

Change-Id: I5c4b43bba1469e14474d20a3627eafa597459e6e
(cherry picked from commit 115150df8947a91e48f62b3dd4e446763fa288cd)
telephony: disable the use of SMS_EXPECT_MORE by default (1/2)

CodeAurora added the use of the RIL_REQUEST_SEND_SMS_EXPECT_MORE API
which is not supported by every RIL. Disabled it by default to reflect
AOSP behavior and added a flag to enable it.

Change-Id: I837c161bbca3960e7458ea049f896218d5e60a63
(cherry picked from commit af64bc66a151287e137c91e3cd09d607386f6613)