[Xamarin.Android.Build.Tasks] Remove Unsupported Lint Checks

[dellis1972]

If a user provides lint checks which are not supported by
the current lint version it will error.

Invalid id or ategory "StatckFieldLeak"

This is normally ok. But in our build system we sometimes end up
on a bot which has an older version of lint. And in this case
the test fails, which in reality it should ignore the id we
are trying to use.

So this commit addds some validation to the Disabled and Enabled
checks. If its not supported we will remove the check and issue
a warning.

[dellis1972]

build

[jonpryor]

Instead of (,)?, I think this should use $@"\b{issue.Key}\b" (word boundaries), so that e.g. UnusedResourcesAreFun isn't matched against UnusedResources. \b would also "match" ,.

[dellis1972]

We still need the (,)? because we want to remove a ending comma with the string replace.

Foo,Foo1,Foo2

if we don't include the comma we end up with

Foo,,Foo2

or

Foo,Foo1,

both of which lint will complain about. That said adding the word boundaries should work too.

[jonpryor]

This block and the following block are largely identical in structure, they just deal with different variables. This should be factored out into a method.

[jonpryor]

You don't need the ,. The \b word boundary will still be triggered at a comma.

var r = new Regex(@"\bFoo\b");
r.Match ("Foo").Success;     // true
r.Match ("Foo,").Success;    // true
r.Match ("Foo,Bar").Success; // true
r.Match ("FooBar").Success;  // false