feat: give ability to plugins to edit blocks before locking (PR #2336)

Plugins can use `.before('BlockFinisher')` to edit blocks before they are locked.

jadx-core/src/main/java/jadx/core/Jadx.java

@@ -47,6 +47,7 @@
 import jadx.core.dex.visitors.ShadowFieldVisitor;
 import jadx.core.dex.visitors.SignatureProcessor;
 import jadx.core.dex.visitors.SimplifyVisitor;
+import jadx.core.dex.visitors.blocks.BlockFinisher;
 import jadx.core.dex.visitors.blocks.BlockProcessor;
 import jadx.core.dex.visitors.blocks.BlockSplitter;
 import jadx.core.dex.visitors.debuginfo.DebugInfoApplyVisitor;
@@ -131,6 +132,7 @@ public static List<IDexTreeVisitor> getRegionsModePasses(JadxArgs args) {
 		// blocks IR
 		passes.add(new BlockSplitter());
 		passes.add(new BlockProcessor());
+		passes.add(new BlockFinisher());
 		if (args.isRawCFGOutput()) {
 			passes.add(DotGraphVisitor.dumpRaw());
 		}

jadx-core/src/main/java/jadx/core/dex/visitors/blocks/BlockFinisher.java

@@ -0,0 +1,17 @@
+package jadx.core.dex.visitors.blocks;
+
+import jadx.core.dex.attributes.AFlag;
+import jadx.core.dex.nodes.MethodNode;
+import jadx.core.dex.visitors.AbstractVisitor;
+
+public class BlockFinisher extends AbstractVisitor {
+	@Override
+	public void visit(MethodNode mth) {
+		if (mth.isNoCode() || mth.getBasicBlocks().isEmpty()) {
+			return;
+		}
+		if (!mth.contains(AFlag.DISABLE_BLOCKS_LOCK)) {
+			mth.finishBasicBlocks();
+		}
+	}
+}

jadx-core/src/main/java/jadx/core/dex/visitors/blocks/BlockProcessor.java

@@ -92,9 +92,6 @@ private static void processBlocksTree(MethodNode mth) {
 		PostDominatorTree.compute(mth);
 
 		updateCleanSuccessors(mth);
-		if (!mth.contains(AFlag.DISABLE_BLOCKS_LOCK)) {
-			mth.finishBasicBlocks();
-		}
 	}
 
 	static void updateCleanSuccessors(MethodNode mth) {