Treat the alias column as a BLOB.

Fixes: 173546362
Test: atest keystore2_test
Change-Id: Ie65cb2cfc223adefc48a98c9b601146915cf9e63
diff --git a/keystore2/src/database.rs b/keystore2/src/database.rs
index 0ce4ad6..1f77cbe 100644
--- a/keystore2/src/database.rs
+++ b/keystore2/src/database.rs
@@ -264,7 +264,7 @@
                      creation_date DATETIME,
                      domain INTEGER,
                      namespace INTEGER,
-                     alias TEXT);",
+                     alias BLOB);",
             NO_PARAMS,
         )
         .context("Failed to initialize \"keyentry\" table.")?;