Bunch of refactoring

- Get rid of KeyProfile and use DatabaseEntry directly
- Don't store Google auth style urls in the db, but use separate fields
- Update testdata to reflect db format changes
- Lay the ground work for HOTP support
- Refactor KeyInfo and split it into OtpInfo, TotpInto and HotpInfo
- Surely some other stuff I forgot about

app/src/main/java/me/impy/aegis/otp/GoogleAuthInfoException.java

@@ -0,0 +1,24 @@
+package me.impy.aegis.otp;
+
+public class GoogleAuthInfoException extends Exception {
+    public GoogleAuthInfoException(Throwable cause) {
+        super(cause);
+    }
+
+    public GoogleAuthInfoException(String message) {
+        super(message);
+    }
+
+    public GoogleAuthInfoException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    @Override
+    public String getMessage() {
+        Throwable cause = getCause();
+        if (cause == null) {
+            return super.getMessage();
+        }
+        return String.format("%s (%s)", super.getMessage(), cause.getMessage());
+    }
+}