Search for default_team in Android.bp when other .bp files are included.

Test: m all_teams && gqui from  "flatten(out/soong/ownership/all_teams.pb, teams)" proto build/soong/android/team_proto/team.proto:AllTeams 'select teams.path, count(*) where teams.trendy_team_id == "4768044190400512" and teams.path like "%libcore%"  group by teams.path '

  Now we get the libcore entries for JavaLibrary.bp and NativeCode.bp as
  well.  Before we didn't
        ...
	| external/icu/android_icu4j/libcore_bridge/src/native/Android.bp |        1 |
	| libcore/Android.bp                                              |        3 |
	| libcore/Extras.bp                                               |        1 |
	| libcore/JavaLibrary.bp                                          |       82 |
	| libcore/NativeCode.bp                                           |       10 |
	| libcore/benchmarks/Android.bp                                   |        3 |
	...

Note: blueprint does not let include a file from a subdirectory.

Bug: b/355270459
Change-Id: I19b22e341276c724786ea96e237733eac4f19dbf