V4L2ComponentStore: Avoid dynamic loading shared library

Originally V4L2ComponentStore and V4L2ComponentFactory depends on each
other. To avoid circular dependency, V4L2ComponentStore dynamically
loads the shared library of V4L2ComponentFactory.

This CL removes the dependency from V4L2ComponentFactory to
V4L2ComponentStore, and also avoid dynamic loading the shared library.

Bug: 160110846
Test: android.media.cts.AdaptivePlaybackTest

Change-Id: I864b642035ea5b1572ee1d474ad12706147cbed1