Compute and cache oat file status in OatFileAssistant.

Instead of computing and caching IsOutOfDate + IsUpToDate separately.

Test: oat file assistant tests.
Change-Id: Ic93812d99c547f54a1c29315d9a3572180cee8d1
diff --git a/runtime/oat_file_assistant.h b/runtime/oat_file_assistant.h
index b8fea82..e706a30 100644
--- a/runtime/oat_file_assistant.h
+++ b/runtime/oat_file_assistant.h
@@ -239,12 +239,9 @@
   // |OatFileExists() == true|.
   CompilerFilter::Filter OatFileCompilerFilter();
 
-  // These methods return the status for a given opened oat file with respect
-  // to the dex location.
+  // Return the status for a given opened oat file with respect to the dex
+  // location.
   OatStatus GivenOatFileStatus(const OatFile& file);
-  bool GivenOatFileIsOutOfDate(const OatFile& file);
-  bool GivenOatFileNeedsRelocation(const OatFile& file);
-  bool GivenOatFileIsUpToDate(const OatFile& file);
 
   // Generates the oat file by relocation from the named input file.
   // This does not check the current status before attempting to relocate the
@@ -397,13 +394,9 @@
   bool odex_file_load_attempted_ = false;
   std::unique_ptr<OatFile> cached_odex_file_;
 
-  // Cached results for OdexFileIsOutOfDate
-  bool odex_file_is_out_of_date_attempted_ = false;
-  bool cached_odex_file_is_out_of_date_;
-
-  // Cached results for OdexFileIsUpToDate
-  bool odex_file_is_up_to_date_attempted_ = false;
-  bool cached_odex_file_is_up_to_date_;
+  // Cached results for OdexFileStatus
+  bool odex_file_status_attempted_ = false;
+  OatStatus cached_odex_file_status_;
 
   // Cached value of the oat file name.
   // This should be accessed only by the OatFileName() method.
@@ -417,13 +410,9 @@
   bool oat_file_load_attempted_ = false;
   std::unique_ptr<OatFile> cached_oat_file_;
 
-  // Cached results for OatFileIsOutOfDate
-  bool oat_file_is_out_of_date_attempted_ = false;
-  bool cached_oat_file_is_out_of_date_;
-
-  // Cached results for OatFileIsUpToDate
-  bool oat_file_is_up_to_date_attempted_ = false;
-  bool cached_oat_file_is_up_to_date_;
+  // Cached results for OatFileStatus
+  bool oat_file_status_attempted_ = false;
+  OatStatus cached_oat_file_status_;
 
   // Cached value of the image info.
   // Use the GetImageInfo method rather than accessing these directly.