Remove unused Calendar field in Browser state

Restoring Calendar object from browser state calls
Services.initServiceInfo() for the very first time
to gather provider services in the system. This call
takes around ~1 second, which inturn slows down browser
main thread by ~300ms. This patch removes storing and
restoring of Calendar objects in Browser state.

Change-Id: I9e450643763d1ea0362c02f056dd96d46785ae43
1 file changed