[flutter_tools] investigate whether tool should order Android Studio installations by dirname

[christopherfujino]

If a flutter user has multiple Android Studio installations on their computer, we determine which is the "newest". The first way we order these is lexicographically comparing the directory names. This seems the wrong approach.

See discussion in #124771 for more context.

[andrewkolos]

For clarity, we sort by version first. We sort lexicographically only when two installations have equal or unknown versions.

[christopherfujino]

Yeah, this might be a "this is fine" moment.