Bug 1598068 - Increase Android targetSdk to 29 r=geckoview-reviewers,aklotz

Differential Revision: https://phabricator.services.mozilla.com/D61013

--HG--
extra : moz-landing-system : lando

build/moz.configure/android-sdk.configure

@@ -41,7 +41,7 @@ def android_sdk_root(value):
 
 @depends('--help')
 def android_sdk_version(_):
-    return namespace(build_tools_versions=['28.0.3'], target_sdk_version='28')
+    return namespace(build_tools_versions=['28.0.3'], target_sdk_version='29')
 
 
 @depends(android_sdk_root, android_sdk_version)