Support "LOCAL_FDO_SUPPORT := always".

"LOCAL_FDO_SUPPORT := always" enables FDO without user specifying
"BUILD_FDO_OPTIMIZE := true", i.e. it turns on FDO for a
module in any build configuration.

Change-Id: I05d8db2edb2b3f5db073fa14d5bf1083a04571c0
(cherry picked from commit 45d0143a)