fix : converted all inner class based alert dialog box to our global class based dialog box

[ReCodee]

Issue Fix

Fixes #660

Description

Changes made:

• Converted all android inner class based alert dialog boxes to our own global class based dialog box.

• Added NeutralListener in DialogBox.java to provide functionality to add NeutralButton in the DialogBox.

• Added a parameter for View in show() to provide an option to set a view in the dialog box or null can be passed.

• Overloaded show() methods in DialogBox.java to facilitate different types of dialog boxes for eg: with or without a message and with or without a neutral button.

• [x] Apply the AndroidStyle.xml style template to your code in Android Studio.

• [x] Run the unit tests with ./gradlew check to make sure you didn't break anything

• [x] If you have multiple commits please combine them into one commit by squashing them.

[ReCodee]

@devansh-299 PTAL :)