Move ignorabletest library to common location and rename.

Bug: 260692911
Bug: 273512262
Test: atest apkdmverity.test libdm_rust.test
Change-Id: I686b5366f8e5c2acf6ebc818ab70073da967b515
diff --git a/apkdmverity/src/main.rs b/apkdmverity/src/main.rs
index 55953a9..d9e9e2b 100644
--- a/apkdmverity/src/main.rs
+++ b/apkdmverity/src/main.rs
@@ -153,12 +153,12 @@
 }
 
 #[cfg(test)]
-ignorabletest::test_main!();
+rdroidtest::test_main!();
 
 #[cfg(test)]
 mod tests {
     use crate::*;
-    use ignorabletest::test;
+    use rdroidtest::test;
     use std::fs::{File, OpenOptions};
     use std::io::Write;
     use std::ops::Deref;