Introduce conscrypt linker namespace.

And have the linker translate a java library path from an apex
to a linker namespace.

Bug: 122874359
Test: m, boots, gtest, run-test, CtsJdwpTests
Change-Id: I216c3509c45589d28acdac068aec53877aeb104a
Exempt-From-Owner-Approval: Carrying Jiyong's +2