too many files in splits/base-ldpi.apk

**Describe the bug**
all the png version of a drawable are present in splits/base-ldpi.apk (only the ldpi version is wanted in this split)

**Bundletool version(s) affected**
1.8.1

**Stacktrace**
unzip -l splits/base-ldpi.apk | grep test_image
1572 1981-01-01 01:01 res/drawable-anydpi-v24/test_image.xml
2037 1981-01-01 01:01 res/drawable-hdpi-v4/test_image.png
795 1981-01-01 01:01 res/drawable-ldpi-v4/test_image.png
1313 1981-01-01 01:01 res/drawable-mdpi-v4/test_image.png
2220 1981-01-01 01:01 res/drawable-xhdpi-v4/test_image.png
3377 1981-01-01 01:01 res/drawable-xxhdpi-v4/test_image.png
4718 1981-01-01 01:01 res/drawable-xxxhdpi-v4/test_image.png

**To Reproduce**
wget -O app-debug.aab https://github.com/PiR43/bundletool/blob/master/src/test/resources/com/android/tools/build/bundletool/testdata/aab/app-debug.aab\?raw\=true
java -jar /opt/bundletool-all-1.8.1.jar build-apks --bundle=app-debug.aab
unzip full.apks
unzip -l splits/base-ldpi.apk | grep test_image
1572 1981-01-01 01:01 res/drawable-anydpi-v24/test_image.xml
2037 1981-01-01 01:01 res/drawable-hdpi-v4/test_image.png
**795 1981-01-01 01:01 res/drawable-ldpi-v4/test_image.png
1313 1981-01-01 01:01 res/drawable-mdpi-v4/test_image.png
2220 1981-01-01 01:01 res/drawable-xhdpi-v4/test_image.png
3377 1981-01-01 01:01 res/drawable-xxhdpi-v4/test_image.png
4718 1981-01-01 01:01 res/drawable-xxxhdpi-v4/test_image.png**
unzip -l splits/base-xhdpi.apk | grep test_image
1572 1981-01-01 01:01 res/drawable-anydpi-v24/test_image.xml
unzip -l splits/base-master.apk | grep test_image
788 1981-01-01 01:01 res/drawable-anydpi-v24/$test_image__0.xml

**Expected behavior**
I would like splits/base-ldpi.apk have only necessary resources files for be smaller.

**Known workaround**
If you have found a workaround, please specify what it is.

**Environment:**
N/A (Not installed on an device)

**Additional context**
The test_image is included from an library (.aar) who have a lower min sdk (16) than the project (24)
And it seems the problem is when project min sdk is the same than the xml drawable res/drawable-anydpi-**v24**/test_image.xml
Perhaps in this case png are not necessary (the xml drawable is enougth) but why they are put in splits/base-ldpi.apk ?