Pull Request template

Purpose / Description

As sometime it needed to toast in AnkiDroid. This will create native toast of message passed by card developer
This is continuation of #6307

Fixes

Fixes Link to the issues.

Approach

Added signal for calling function
In card.js

ankiShowToast(msg)

How Has This Been Tested?

Tested on emulator,
The function accept string for showing toast message
In front side of card template add it in <script> tag

ankiShowToast("Showing native toast using javascript");

Learning (optional, can help others)

https://developer.android.com/guide/topics/ui/notifiers/toasts

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