Remove kxml dependency [DO NOT MERGE]

Create XmlPullParser using callback provided by the client. This enables
clients to choose which XmlPullParser implementation they want.

Change-Id: I9ad97a4777820cdbe5c8fc3716f74ddec9065c70
(cherry picked from commit 78af25584633462e4ab8cf9bafe10f43e7cb2d83)
7 files changed