Compress precompiled python zips

When making this script deterministic we accidentally changed it so that
none of the entries in the output zip file were compressed. Re-add
the compression.

Adding the compression makes atest go from 67M to 34M, at the cost of
0.33s startup time instead of 0.28s.

Test: Presubmits
Change-Id: I4e58eb76235ddabf0195694cdd3644f26b7e84ec

python/scripts/precompile_python.py

@@ -30,6 +30,7 @@ def process_one_file(name, infile, outzip):
     # Date was chosen to be the same as
     # https://cs.android.com/android/platform/superproject/main/+/main:build/soong/jar/jar.go;l=36;drc=2863e4535eb65e15f955dc8ed48fa99b1d2a1db5
     info = zipfile.ZipInfo(filename=name, date_time=(2008, 1, 1, 0, 0, 0))
+    info.compress_type = zipfile.ZIP_DEFLATED
 
     if not info.filename.endswith('.py'):
         outzip.writestr(info, infile.read())