[Android] Fallback logic for fluent icons

[singhmanp0707]

Related Issue

Some fluent icons don't have all the available sizes. If we provide a size which is not available for that icon then icon is not found, and unavailable icon is shown.

As part of this PR, we are writing logic to find closest available size for fluent icon. Following is an example on how it will work:

• Imagine an icon that whose SVG assets are available in sizes 24 and 48
• To render that icon at size xSmall (24 pixels), the logic would pick the 24px SVG asset
• To render it at size xxSmall, the logic would also pick the 24px SVG asset
• To render it a sizes Standard, the logic would again pick the 24px SVG asset because 32-24 < 48-32
• To render at sizes Medium and above, the logic would pick the 48px SVG asset

We are adding new mapping of IconSize enum.

How Verified

RTL