Bring back the SECONDARY_STORAGE variable

This variable is a requirement in KK as newly introduced APIs
such as Context.getExternalFilesDirs uses it to retrieve
secondary storage locations on the device.

Change-Id: I17708c93498da5979c5742cad32232a34490bf5f
smdk4412-common: update media codecs

Change-Id: I6730d0a10912688fa4fec2ec65582a9e2c940bca
smdk4412: audio: Remove hackaround for broken audio in first call

It's not needed anymore.

Change-Id: If8e15afa41bd328732e7c77f2d2027c310a9cc2c
smdk4412-common: init: remove duplicate socket contexts for wpa

Already set from the global file_contexts for /dev/socket/wpa_wlan[0-9],
they have no effect here

Change-Id: I7056ef311ee6636327a980f26b93f9fbfbd44b27
Merge "Bring back the SECONDARY_STORAGE variable" into kk4.4
Merge "smdk4412-common: update media codecs" into kk4.4
Merge "smdk4412: audio: Remove hackaround for broken audio in first call" into kk4.4
Merge "smdk4412-common: init: remove duplicate socket contexts for wpa" into kk4.4