liblog: add __android_log_close() Bug: 30963384 (cherry picked from commit df7a4c6bae5f85532d79a93b7d9197a2aab17825) Change-Id: Ide70df3c04e29301649a1ca234b1b0af687bcbfb (cherry picked from commit b1b5d507cba4b37221016d308dbf9fdd39019108)