fix: regenerate code for CharSequence, fix nested proto package names

Regenerate all proto/gRPC/CLI code after jni v0.0.5 fixed CharSequence
return type from string to *jni.Object. Methods returning CharSequence
now correctly use the object-handle pattern instead of string assignment.

Fix proto package name for nested packages (health/connect,
security/keystore): use dots instead of slashes in proto package
declaration. Add ProtoPackage field to ProtoData.

Fix proto filename for nested packages: use filepath.Base for the
filename segment.

Author: xaionaro@dx.center