[incfs] Use the new libincfs API for file status checking

libincfs got a new set of functions for checking the file loaded
status, which works more efficiently than getting filled ranges.

Bug: 183067554
Test: atest IncrementalServiceTest
Change-Id: I3b96bf409f1778c5a89e4802e2005197f70ce0cb
diff --git a/services/incremental/ServiceWrappers.h b/services/incremental/ServiceWrappers.h
index 231b76f..2f3eb24 100644
--- a/services/incremental/ServiceWrappers.h
+++ b/services/incremental/ServiceWrappers.h
@@ -102,6 +102,9 @@
     virtual std::string toString(FileId fileId) const = 0;
     virtual std::pair<IncFsBlockIndex, IncFsBlockIndex> countFilledBlocks(
             const Control& control, std::string_view path) const = 0;
+    virtual incfs::LoadingState isFileFullyLoaded(const Control& control,
+                                                  std::string_view path) const = 0;
+    virtual incfs::LoadingState isEverythingFullyLoaded(const Control& control) const = 0;
     virtual ErrorCode link(const Control& control, std::string_view from,
                            std::string_view to) const = 0;
     virtual ErrorCode unlink(const Control& control, std::string_view path) const = 0;