test/langtools/tools/javap 12 test classes use com.sun.tools.classfile library

The list of tests to convert is:

$ find test/langtools/tools/javap -type f -name '*.java' | xargs grep -w -l 'import com.sun.tools.classfile'
test/langtools/tools/javap/T6716452.java
test/langtools/tools/javap/typeAnnotations/Wildcards.java
test/langtools/tools/javap/typeAnnotations/Visibility.java
test/langtools/tools/javap/typeAnnotations/NewArray.java
test/langtools/tools/javap/typeAnnotations/PresenceInner.java
test/langtools/tools/javap/typeAnnotations/JSR175Annotations.java
test/langtools/tools/javap/typeAnnotations/TypeCasts.java
test/langtools/tools/javap/typeAnnotations/Presence.java
test/langtools/tools/javap/classfile/T6887895.java
test/langtools/tools/javap/classfile/deps/GetDeps.java
test/langtools/tools/javap/classfile/6888367/T6888367.java
test/langtools/tools/javap/TestClassNameWarning.java