Handle retry count

Test: vdc setCheckpoint 2 then reboot 3 times checking state
Bug: 112901762
Change-Id: I85a71d059bca27b76175b9bd8465cc453f0ddb8d
diff --git a/Checkpoint.h b/Checkpoint.h
index 54574a7..f3554cc 100644
--- a/Checkpoint.h
+++ b/Checkpoint.h
@@ -32,7 +32,7 @@
 
 bool cp_needsCheckpoint();
 
-bool cp_prepareDriveForCheckpoint(const std::string& mountPoint);
+bool cp_prepareCheckpoint();
 
 bool cp_restoreCheckpoint(const std::string& mountPoint);