[AOSP-pick] Make run configurations configurable

[LeFrosch]

Cherry pick AOSP commit 990fdde7dae9cb0964c3e8339c3e8d6698b45e7e.

Let users control the IDE.

1. Allow breaking links between XML files and run configurations. It
   often happens that one need to modify an imported configuration.
   If syncing is disabled it won't be auto-updated by the sync unless
   the link is re-enabled by the user.

2. Do not auto-detect the configuration handler every time the set of
   selected build targets change. This may look like being helpful but
   it is not obvious to users. Instead, the IDE should warn users about
   incompatible run configuration handlers.

   This will also prevent the IDE from corrupting run configurations
   imported from XML files.

3. Keep auto-detecting the handler when the build targets are set for
   the first time since run configuration syncing depends on this
   behavior.

4. Allow users to choose the run configuration handler manually. It is
   absolutely fine to just build and Android binary target and it is
   also fine to attempt to deploy any other target. Most will fail but
   some may be compatible rules.

5. In the future, add a button to detect the handler automatically,
   which if needed can query blaze/depserver for the target kind if
   unknown.

NOTE: This does not fix the issues itself and those run configurations
that failed to be imported correctly won't bew imported correctly
afterwards, however this change allows users to fix run
configurations themselves.

Bug: 382099213
Test: n/a (unfortunately)
Change-Id: I979a3cf9f32a0425b2732ee105212aef9985a0ab

AOSP: 990fdde7dae9cb0964c3e8339c3e8d6698b45e7e