Fix warning: defaults for choice values not supported

Change-Id: I6b36bd49c47427fd151aa97365a5ae4d9bad5b8f
Fix warning: 'it.task' may be used uninitialized

Change-Id: I753558d173011c38c2079a6a2204828eb92da934
defconfig: Enable all 4.3 features needed

Change-Id: I8dfd33a0545512442b2ca297ea0ca96021fbdb2e