Move violation extra messages into throwable

Some violations have a separate string from the throwable. Prepending
the string to the throwable's message or using it as the message sets us
up for all violations to extend Throwable.

Bug: 62458734
Test: cts-tradefed run cts-dev --module CtsOsTestCases --test
android.os.cts.StrictModeTest
Change-Id: I6a97ee69a90fb975dc453ca37fe53ea78ebfe974