common: Annotate some methods in String
All variants of:
copyValueOf()
format()
intern()
toString()*
valueOf()
return a non-null value, so can be marked as such.
* Do not confound with Object.toString()! That one has no nullness
guarantees.
Change-Id: Ia739dab7ab294e0c32156bd3b756f4241e97a4a1
Signed-off-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/59163
Reviewed-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Tested-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Reviewed-by: Hudson CI
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