Added Solution to 832.Flipping an image in Java (google interview Question)

[souvikrajsingh]

Pull Request Template

Description

Please include a summary of the problem and about the approach to solve the solution. Please also include relevant motivation and context. List any dependencies that are required for this change.

Put checkmarks:

Have you made changes in README file ?

• [x] Added problem & solution under correct topic.
• [x] Specified Space & Time complexity.
• [x] Specified difficulty level, tag & Note(if any).

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration.

• [[1,1,0],[1,0,1],[0,0,0]] Test A
• [[1,1,0,0],[1,0,0,1],[0,1,1,1],[1,0,1,0]] Test B

Make sure all below guidelines are followed else PR will get Reject:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code so that it is easy to understand
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] Any dependent changes have been merged and published in downstream modules

[welcome[bot]]

I can tell this is your first pull request! Thank you I'm so honored. :tada::tada::tada: I'll take a look at it ASAP!

[souvikrajsingh]

Also update Readme file

Done !! Please Review it and let me know if I need to make any necessary changes, thanks @GouravRusiya30

[souvikrajsingh]

Sure thing !

[souvikrajsingh]

@GouravRusiya30 please check and let me know if it needs changes