Move sysMapFile and sysReleaseMap into MemMapping class.

Test: recovery_component_test
Test: recovery_unit_test
Test: Apply an OTA on angler.
Change-Id: I7170f03e4ce1fe06184ca1d7bcce0a695f33ac4d
diff --git a/tests/component/updater_test.cpp b/tests/component/updater_test.cpp
index dc4b5d7..35e87fd 100644
--- a/tests/component/updater_test.cpp
+++ b/tests/component/updater_test.cpp
@@ -570,7 +570,7 @@
   ASSERT_EQ(0, fclose(zip_file_ptr));
 
   MemMapping map;
-  ASSERT_EQ(0, sysMapFile(zip_file.path, &map));
+  ASSERT_TRUE(map.MapFile(zip_file.path));
   ZipArchiveHandle handle;
   ASSERT_EQ(0, OpenArchiveFromMemory(map.addr, map.length, zip_file.path, &handle));
 
@@ -646,7 +646,7 @@
   ASSERT_EQ(0, fclose(zip_file_ptr));
 
   MemMapping map;
-  ASSERT_EQ(0, sysMapFile(zip_file.path, &map));
+  ASSERT_TRUE(map.MapFile(zip_file.path));
   ZipArchiveHandle handle;
   ASSERT_EQ(0, OpenArchiveFromMemory(map.addr, map.length, zip_file.path, &handle));