Clean up FingerprintManager API and make it public.

Change-Id: I416dcc42fd70926875cc77e0c2cc958fdfcd9f9d
diff --git a/modules/fingerprint/fingerprint.c b/modules/fingerprint/fingerprint.c
index 0f11954..f9fd44b 100644
--- a/modules/fingerprint/fingerprint.c
+++ b/modules/fingerprint/fingerprint.c
@@ -38,7 +38,7 @@
     return FINGERPRINT_ERROR;
 }
 
-static int fingerprint_enroll_cancel(struct fingerprint_device __unused *dev) {
+static int fingerprint_cancel(struct fingerprint_device __unused *dev) {
     return FINGERPRINT_ERROR;
 }
 
@@ -81,7 +81,7 @@
     dev->common.close = fingerprint_close;
 
     dev->enroll = fingerprint_enroll;
-    dev->enroll_cancel = fingerprint_enroll_cancel;
+    dev->cancel = fingerprint_cancel;
     dev->remove = fingerprint_remove;
     dev->set_active_group = fingerprint_set_active_group;
     dev->authenticate = fingerprint_authenticate;