Get Topbar shown status in card

[krmanik]

Pull Request template

Purpose / Description

It helps in dynamically show / hide deckname, card count and time at top using status of topbar and fullscreen like in image below.

<script>
if (!AnkiDroidJS.ankiIsTopbarShown() && AnkiDroidJS.ankiIsInFullscreen()) {
     showCustomTopDesign();
} 
// else hidden

function showCustomTopDesign() {
...
...
}
</script>

Fixes

Fixes Link to the issues.

Approach

Using JavascriptInterface

How Has This Been Tested?

Testes on emulator.

1. Add to front/back side of card

<script>
console.log(AnkiDroidJS.ankiIsTopbarShown());
</script>

Learning (optional, can help others)

https://developer.android.com/reference/android/webkit/JavascriptInterface

Links to blog posts, patterns, libraries or addons used to solve this problem

Checklist

Please, go through these checks before submitting the PR.

• [ x ] You have not changed whitespace unnecessarily (it makes diffs hard to read)
• [ x ] You have a descriptive commit message with a short title (first line, max 50 chars).
• [ x ] Your code follows the style of the project (e.g. never omit braces in if statements)
• [ x ] You have commented your code, particularly in hard-to-understand areas
• [ x ] You have performed a self-review of your own code

[david-allison]

LGTM