Update AnkiDroid to 2.15.6 (21506300)

metadata/com.ichi2.anki.yml

@@ -758,9 +758,25 @@ Builds:
       - sed -i -e '/Temporary/,/End temporary/d' ../build.gradle
     ndk: r22b
 
+  - versionName: 2.15.6
+    versionCode: 21506300
+    commit: 58c5bd15e897bfb32a2badc80018729b0a7238d6
+    subdir: AnkiDroid
+    gradle:
+      - play
+    rm:
+      - tools
+      - docs
+    prebuild:
+      - sed -i -e 's/22.0.7026061/22.1.7171670/' -e '/splits {/,/^    }/d' -e '/applicationVariants.all/,/^    }/d'
+        build.gradle
+      - sed -i -e '/publishing/,/^}/d' -e '/publish/d' ../api/build.gradle
+      - sed -i -e '/Temporary/,/End temporary/d' ../build.gradle
+    ndk: r22b
+
 MaintainerNotes: Uses DexLoader to load custom decks and plugins (?).
 
 AutoUpdateMode: Version v%v
 UpdateCheckMode: Tags ^v[0-9.]*$
-CurrentVersion: 2.15.5
-CurrentVersionCode: 21505300
+CurrentVersion: 2.15.6
+CurrentVersionCode: 21506300