[libprofcollectd] Fix binder import path

Import from the binder crate root instead of binder::public_api for
compatibility with the new crate structure.

Test: m
Bug: 196056781
Change-Id: I773767a3ae1cd797fe937a4f72f9588d63119e4c

Author: Stephen Crane

profcollectd/libprofcollectd/service.rs

@@ -17,7 +17,7 @@
 //! ProfCollect Binder service implementation.
 
 use anyhow::{anyhow, Context, Error, Result};
-use binder::public_api::Result as BinderResult;
+use binder::Result as BinderResult;
 use binder::Status;
 use profcollectd_aidl_interface::aidl::com::android::server::profcollect::IProfCollectd::IProfCollectd;
 use std::ffi::CString;