min_sdk_version should be (level) and not (kind+level).

system_current is only meaningful to sdk_version. min_sdk_version should
provide information about the version of the device and not the
api surface the jar file was compiled against

Test: no change in ninja file
Bug: 208456999
Change-Id: I6bf4e855032b41d0da44b672168eb3a681abefa0
Merged-In: I6bf4e855032b41d0da44b672168eb3a681abefa0