Add --enable-compact-entries to aapt2 convert

Currently, when we run the resource shrinker we will do:
 - Convert apk from binary to proto
 - Do resource shrinking
 - Convert shrunken proto format apk back to binary

The original apk is linked with --enable-compact-entries (which we generally set on platform)
but the flag is not available when converting, so the last conversion step will not use the compact mode

Bug: 294016857
Test: tableflattener tests already cover these, this is just a flag passed

Change-Id: If5f1336c5eb3736bc40db89cdefe6f1a9aa189dd