fix: elemSize=0 fill_array_data_payload insn obfuscation (PR #1082)

Co-authored-by: Nhexun <hexun@fenbi.com>

jadx-core/src/main/java/jadx/core/dex/instructions/FillArrayData.java

@@ -39,6 +39,7 @@ public final class FillArrayData extends InsnNode {
 	private static ArgType getElementType(int elementWidthUnit) {
 		switch (elementWidthUnit) {
 			case 1:
+			case 0:
 				return ONE_BYTE_TYPE;
 			case 2:
 				return TWO_BYTES_TYPE;

jadx-plugins/jadx-dex-input/src/main/java/jadx/plugins/input/dex/insns/DexInsnFormat.java

@@ -336,6 +336,10 @@ public abstract class DexInsnFormat {
 					data = array;
 					break;
 				}
+				case 0: {
+					data = new byte[0];
+					break;
+				}
 				default:
 					throw new DexException("Unexpected element size in FILL_ARRAY_DATA_PAYLOAD: " + elemSize);
 			}