[#1103,duplicated PR] Added the jpg output format as apart of the PNG, improve for compatibility

[Gary709]

Description

Please include a summary of the change and which issue is fixed. List any dependencies that are
required for this change.
Add a new JPG output format which suits for devices that do not support PNG
Users can self-select their preferred format
Here's a demo video
https://github.com/Swati4star/Images-to-PDF/assets/97233980/953a7d3d-7365-4338-8540-2a01b1211cfe

Type of change

Just put an x in the [] which are valid.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.
The demo video shows that when PDF is converted to image, it will generate both PNG and JPG files.

• ./gradlew assembleDebug assembleRelease
• ./gradlew checkstyle

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[codeclimate]

Code Climate has analyzed commit 596a437 and detected 1 issue on this pull request.

Here's the issue category breakdown:

Category	Count
Complexity	1

View more on Code Climate.

[Gary709]

Okay, I will fixed the complexity error

[Gary709]

Fixed complexity error, added JavaDoc, comments. etc