ANDROID: more KABI macros for gendwarfksyms

gendwarfksyms now supports the hiding of:

* type size changes
* arbitrary type definition and symbol type changes

This change introduces two new macros:

* ANDROID_KABI_BYTE_SIZE(name, bytes_size)
* ANDROID_KABI_TYPE_STRING("s#foo", "symtype definition")

Bug: 400972353
Change-Id: Ib8da78ba7dd6ec50de3cef7594d7cfe500c7dba5
Signed-off-by: Giuliano Procida <gprocida@google.com>