Fixup JDWP for obsolete methods

We needed to implement some additional methods and behaviors in JDWP
in order to support JVMTI obsolete methods.

Test: Manual (using art/test/915-obsolete-2 & jdb debugger)
Test: Manual (using art/test/915-obsolete-2 & Android Studio/IntelliJ debugger)

Bug: 31455788

Change-Id: I20c2fa27a2dd002e37526b126f23ce552f19e623