sh_binary prefer 32bit when TARGET_PREFER_32_BIT

The module type can be referenced in the 'binaries' property of an
APEX, where it is expected that the binary modules prefer 32bit arch
when the build is configured with TARGET_PREFER_32_BIT. Satisfying the
expectation by allowing the module types to use 32bit arch in the
case.

Bug: 144532908
Test: choosecombo 1 aosp_arm64 userdebug; TARGET_PREFER_32_BIT=true m;
Change-Id: I2120b40e3230aa695b4c38b850c1ea32e46cbbfb