Define vendor-hwasan-snapshot target

By building vendor-hwasan-snapshot target, static hwasan libraries
for vendor image variants will be snapshoted.
The list of candidate libs must be listed in
PRODUCT_VSDK_HWASAN_STATIC_PATHS with module name and source directory
path separated by colon.

For example,
PRODUCT_VSDK_HWASAN_STATIC_PATHS := \
  libbase:system/libbase \
  libc++_static:external/libcxx

Bug: 234772527
Test: SANITIZE_TARGET=hwaddress m vendor-hwasan-snapshot
Change-Id: Ic179740ae3bc8f90d2c5bbca7289ea72262ba8aa