Pass correct parameters to API sendMultipartTextMessage

1. Pass parameter priority, expectMore and validityPeriod
to API sendMultipartTextMessage.

2. Modify validity check algrithm for parameter priority and
validityPeriod, so that avoids the exception for invalid inputs.

Bug: 112013111

Change-Id: I7a90db6e427b3daf6589e6a2b6dad2c4b3458832