Format viewpoint test annotations

[Ao-senXiong]

Fix #873

[wmdietl]

Thanks for looking into this!

[wmdietl]

Can you turn this into two arrays: 1) regular type qualifiers that are not in spotless (yet) 2) test type qualifiers that never make sense to add to spotless.
For the second set, can you add a comment/script, that re-creates the array for future additions?
Then, turn the addTypeAnnotation into a functional style that passes each array element.

[Ao-senXiong]

Looks like spotless does not allow addTypeAnnotation be used as a functional style.
The following code will throw this error, single annotation array is fine and multiple annotations array will cause this problem:

// Regular type qualifiers array that are not in Spotless yet
def regularTypeQualifiers = [
        "PolyInitialized"
]

// Test type qualifiers array
def testTypeQualifiers = [
        "PolyVP", "ReceiverDependentQual"
]

def allQualifiers = regularTypeQualifiers + testTypeQualifiers

// Add all type qualifiers to Spotless
allQualifiers.each { qualifier ->
    formatAnnotations().addTypeAnnotation(qualifier)
}

* What went wrong:
Could not create task ':checker:spotlessJavaCheck'.
Could not create task ':checker:spotlessJava'.
Multiple steps with name 'No line break between type annotation and type' for spotless format 'java'

However, I also notice spotless already support a few of our testannotations so I can simplify it.
https://github.com/diffplug/spotless/blob/85a0bebc71dcf59f56f0ac31b8b2507294cff78d/lib/src/main/java/com/diffplug/spotless/java/FormatAnnotationsStep.java#L51

Also it is good to notice that they format the array in alphabetical order, I am wondering do they use automatical tool to do it or just do it manually.

[wmdietl]

Thanks!