repack: move sbin to /system ramdisk and update repacking
for android-10

This will support updating the ramdisk to a different
compression format and co-exist with magisk.

We are also cleaning up and removing non android-10
api makefile actions.

We are also moving twrp repacking to its own class. We
check the new ramdisk format and if it's different
we have magisk compress using the new ramdisk format.

Change-Id: I770030aae7797e75817178b2f0fccd9f39dc23af
diff --git a/crypto/fscrypt/Decrypt.cpp b/crypto/fscrypt/Decrypt.cpp
index b1a43c9..bd3d067 100755
--- a/crypto/fscrypt/Decrypt.cpp
+++ b/crypto/fscrypt/Decrypt.cpp
@@ -629,7 +629,7 @@
 			if (auth_wait_count == 0 || access("/auth_error", F_OK) == 0) {
 				printf("error during keymaster_auth service\n");
 				/* If you are getting this error, make sure that you have the keymaster_auth service defined in your init scripts, preferrably in init.recovery.{ro.hardware}.rc
-				 * service keystore_auth /sbin/keystore_auth
+				 * service keystore_auth /system/bin/keystore_auth
 				 *     disabled
 				 *     oneshot
 				 *     user system