Fix crash when processing QR code content with a bad URI format

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

@@ -48,6 +48,14 @@ public class GoogleAuthInfo {
         return builder.build();
     }
 
+    public static GoogleAuthInfo parseUri(String s) throws GoogleAuthInfoException {
+        Uri uri = Uri.parse(s);
+        if (uri == null) {
+            throw new GoogleAuthInfoException("bad uri format");
+        }
+        return GoogleAuthInfo.parseUri(uri);
+    }
+
     public static GoogleAuthInfo parseUri(Uri uri) throws GoogleAuthInfoException {
         if (!uri.getScheme().equals("otpauth")) {
             throw new GoogleAuthInfoException("unsupported protocol");

app/src/main/java/me/impy/aegis/ui/ScannerActivity.java

@@ -108,8 +108,7 @@ public class ScannerActivity extends AegisActivity implements ZXingScannerView.R
     public void handleResult(Result rawResult) {
         try {
             // parse google auth uri
-            Uri uri = Uri.parse(rawResult.getText());
-            GoogleAuthInfo info = GoogleAuthInfo.parseUri(uri);
+            GoogleAuthInfo info = GoogleAuthInfo.parseUri(rawResult.getText());
             DatabaseEntry entry = new DatabaseEntry(info);
 
             Intent intent = new Intent();