Use {version:major.minor?} when generating api-versions.xml

Previously, `droidstubs` would pass Metalava `--android-jar-pattern`
options using `{version:level}` as the placeholder for the version.
That meant that Metalava would only use historical API version jars
that had a single integer version, e.g. `prebuilts/sdk/36`. While that
was sufficient in the past, it will not be sufficient in future when
Android starts supporting `major.minor` versions.

This change switches the pattern to use `{version:major.minor?}`. That
will match files without `.minor` so it will match all the files that
would have been matched by the existing `{version:level}`, It will also
match files with `.minor`, e.g. files like `prebuilts/sdk/37.1`.

Bug: 302189716
Test: # Before applying this change run:
      tools/metalava/scripts/gather-android-metalava-artifacts.py before
      # After applying this change run:
      tools/metalava/scripts/gather-android-metalava-artifacts.py after
      # Make sure that there are no differences.
      meld before after
      # Then create a major.minor version in prebuilts/sdk by running:
      cp -r prebuilts/sdk/35 prebuilts/sdk/34.1
      # Run the following
      tools/metalava/scripts/gather-android-metalava-artifacts.py major-minor
      # Make sure references to 35 in `api-versions.xml` and doc stubs have
      # been replaced with 34.1.
      meld before major-minor
Change-Id: I94167ae12f1059853e8e2253eb20442b61dfdebb

0 files changed, 0 insertions, 0 deletions