Cherry Pick launch optimisation commits from Texture 2.8

[raviTokopedia]

Cherry picked the app launch time reduction commits from Texture-2.8.

Following is the list of all the merged PRs

1. Make global static a function local static. This stops it from being initialized premain and affecting startup time.
2. Get rid of file scope initialization that causes a premain startup hit.
3. Move file scope constant that is initialized at startup to function scope to avoid startup hit.
4. Move file level static into a function so that it isn't being initialized pre-main.
5. Initializing the LUT arrays at file level scope creates a large chunk of code retaining and releasing all of the NSStrings in the tables. Moving them to function level moves the initialization to being lazy.