Reland [lsan] Enable LSAN for Android

Reland: a2291a58.

New fixes for the breakages reported in D85927 include:
 - declare a weak decl for `dl_iterate_phdr`, because it does not exist on older  APIs
 - Do not enable leak-sanitizer if api_level is less than 29, because of  `ld.lld: error: undefined symbol: __aeabi_read_tp` for armv7, API level 16.
 - Put back the interceptor for `memalign` but still opt out intercepting `__libc_memalign` and `cfree` because both of these don't exist in Bionic.

Reviewed By: srhines, vitalybuka

Differential Revision: https://reviews.llvm.org/D89251