> для Андроида можно писать?

не поверишь...
Supported targets: ... Android

packages/googleapi/src:

googleacceleratedmobilepageurl.pp  googleadexchangebuyer2.pp  googleadexchangebuyer.pp  googleadexchangeseller.pp  googleadmin.pp  googleadsensehost.pp  googleadsense.pp  googleanalytics.pp  googleanalyticsreporting.pp  googleandroidenterprise.pp  googleandroidpublisher.pp  googleappengine.pp  googleappsactivity.pp  googleappstate.pp  googleaudit.pp  googleautoscaler.pp  googlebase.pp  googlebigquery.pp  googleblogger.pp  googlebooks.pp  googlecalendar.pp  googlecivicinfo.pp  googleclassroom.pp  googleclient.pp  googlecloudbilling.pp  googlecloudbuild.pp  googleclouddebugger.pp  googleclouderrorreporting.pp  googlecloudlatencytest.pp  googlecloudmonitoring.pp  googlecloudresourcemanager.pp  googlecloudsearch.pp  googlecloudtrace.pp  googleclouduseraccounts.pp  googlecomputeaccounts.pp  googlecompute.pp  googleconsumersurveys.pp  googlecontainer.pp  googlecontent.pp  googlecoordinate.pp  googlecustomsearch.pp  googledataflow.pp  googledataproc.pp  googledatastore.pp  googledeploymentmanager.pp  googledfareporting.pp  googlediscovery.pp  googlediscoverytopas.pp  googledns.pp  googledoubleclickbidmanager.pp  googledoubleclicksearch.pp  googledrive.pp  googlefirebaserules.pp  googlefitness.pp  googlefreebase.pp  googlefusiontables.pp  googlegamesconfiguration.pp  googlegamesmanagement.pp  googlegames.pp  googlegan.pp  googlegenomics.pp  googlegmail.pp  googlegroupsmigration.pp  googlegroupssettings.pp  googleiam.pp  googleidentitytoolkit.pp  googlekgsearch.pp  googlelicensing.pp  googlelogging.pp  googlemanager.pp  googlemapsengine.pp  googlemirror.pp  googlemonitoring.pp  googleoauth2.pp  googlepagespeedonline.pp  googlepartners.pp  googlepeople.pp  googleplaymoviespartner.pp  googleplusdomains.pp  googleplus.pp  googleprediction.pp  googleproximitybeacon.pp  googlepubsub.pp  googleqpxexpress.pp  googlereplicapool.pp  googlereplicapoolupdater.pp  googlereseller.pp  googleresourceviews.pp  googleruntimeconfig.pp  googlesafebrowsing.pp  googlescript.pp  googleservice.pp  googleserviceregistry.pp  googlesheets.pp  googlesiteverification.pp  googlespectrum.pp  googlesqladmin.pp  googlestorage.pp  googlestoragetransfer.pp  googletagmanager.pp  googletaskqueue.pp  googletasks.pp  googletoolresults.pp  googletranslate.pp  googleurlshortener.pp  googlevision.pp  googlewebfonts.pp  googlewebmasters.pp  googleyoutubeanalytics.pp  googleyoutube.pp  googleyoutubereporting.pp