Turn off LTO for libaudioflinger_timing

unaligned __cfi_check in the library "libaudioflinger_timing.so" causes
device boot failure on global thinlto build. Disable LTO as a
workaround.

Test: presubmit
Bug: 289475610
Change-Id: Ibb3690897a953bec1d0c0c075796e75935889119