Change PhoneCallDetail fields to be non-final.

It's been a pain to add/change fields on PhoneCallDetails because
a multitude of parameters required for the constructors to create
an instance. I ran into this while considering how to add an
objectId to its parameters, and have previously too...

Make fields non-final so that they are more easily set. This has
the side-effect of making the casing of some initialization code
more straightforward.

+ Change it's constructor to a subset of required fields.
+ Simplify/reorganize CallLogAdapter and CallLogAsyncTaskUtil code.
+ Simplify tests.

Bug: 21733599
Change-Id: I236dfb0b8e6513f4b44dbdae17ce2eb9c9ae4778