Revert "Fix and suppress warnings in external/libspeex." This reverts commit 201a22f03f2757a0fb4c1d89f91d007d84fb2edd. Bug: http://b/77299793 Test: builds (this revert manually tested by bug submitter) (cherry picked from commit 6f971cbdd68a66776600df0b24df086bbec439d3) Change-Id: Ie96f5f243252061a5d0e740641b40dabeb0dade7