Support extracting from sparsechunk super images

Change-Id: If029d717f8001079dab4382b1c91e8b092aae017

extract_utils.sh

@@ -1456,12 +1456,20 @@ function extract() {
         SRC="$DUMPDIR"
     fi
 
+    local SUPERIMG=""
+
     if [ -d "$SRC" ] && [ -f "$SRC"/super.img ]; then
+        SUPERIMG="$SRC"/super.img
+    elif [ -d "$SRC" ] && [ -f "$SRC"/super.img_sparsechunk.0 ]; then
+        SUPERIMG="$(find $SRC -name 'super.img_sparsechunk.*' | sort -V | xargs)"
+    fi
+
+    if [ -n "$SUPERIMG" ]; then
         DUMPDIR="$EXTRACT_TMP_DIR"/super_dump
         mkdir -p "$DUMPDIR"
 
         echo "Unpacking super.img"
-        "$SIMG2IMG" "$SRC"/super.img "$DUMPDIR"/super.raw
+        "$SIMG2IMG" $SUPERIMG "$DUMPDIR"/super.raw
 
         for PARTITION in "system" "odm" "product" "system_ext" "vendor"
         do