The calculation is correct, we're just displaying a different number in the app. On the website, the displayed tag score is your answer score in that tag, and you can get the value for questions by hovering your mouse over the score value. In the app, we show the combined question-and-answer score. The tooltip of the android tag on your profile reads
Asked 37 non-wiki questions with a total score of 149. Gave 187 non-wiki answers with a total score of 219.
and 149+219=368. The count in both cases contains questions and answers.
Honestly, we weren't sure how to handle this in the app were there's no such thing as a tooltip. We discussed it but couldn't come to a real conclusion, so we just picked one solution for now; we're open to changing how it's displayed if a good case can be made for any version.