Start using shared libraries class loader.

Change 1/2. Change 2/2 will setup the class loader namespace for
shared libraries.

This change sets up shared libraries class loaders for applications
and for dexopt.

bug: 111174995
Test: DexoptUtilsTest, device boots

Change-Id: Ie9a2b4eaa85cda59951703433f7a2d03bc12095d
13 files changed