[rilmodem] Nw selection mem leak fix

Signed-off-by: Tommi Kenakkala <tommi.kenakkala@oss.tieto.com>
[rilmodem] Call fwd mem leak fix

Signed-off-by: Tommi Kenakkala <tommi.kenakkala@oss.tieto.com>
Merge pull request #248 from tkenakka/leakfixes

Mem leak fixes
[rilmodem] Gprs fake timer fixes

Fixes timer cancelation logic and a mem leak on timer
callback data cleanup.
Merge pull request #249 from jpoutiai/master

[RILMODEM] fix sim mem leak and code cleaning
Merge pull request #250 from tkenakka/gprs

[rilmodem] Gprs fake timer fixes