Fix compiling with javac

Remove import of an inner class in the same file, and explicitly
reference the static nested class through the outer class.

Bug: 36902714
Test: m -j ANDROID_COMPILE_WITH_JACK=false vehicle-hal-support-lib
Change-Id: I4c58bcae3f26a9f79d5931d0e489d85e7dba46e0
(cherry picked from commit 0f088b64c6c8e65bdfb91c87c837938eb41df91f)
1 file changed