zcash_client_sqlite: Store is_change as INTEGER instead of BOOLEAN

Needed because SQLite internally stores BOOLEAN as INTEGER anyway, but
this causes problems with newer versions of Room on Android.

zcash_client_sqlite/src/init.rs

@@ -89,7 +89,7 @@ pub fn init_data_database<P: AsRef<Path>>(db_data: P) -> Result<(), Error> {
             value INTEGER NOT NULL,
             rcm BLOB NOT NULL,
             nf BLOB NOT NULL UNIQUE,
-            is_change BOOLEAN NOT NULL,
+            is_change INTEGER NOT NULL,
             memo BLOB,
             spent INTEGER,
             FOREIGN KEY (tx) REFERENCES transactions(id_tx),