Fix TextStyle decode misalignment (#8141)

lib/ui/text.dart

@@ -297,21 +297,21 @@ Int32List _encodeTextStyle(
     result[0] |= 1 << 4;
     result[4] = decorationStyle.index;
   }
-  if (decorationThickness != null) {
-    result[0] |= 1 << 5;
-  }
   if (fontWeight != null) {
-    result[0] |= 1 << 6;
+    result[0] |= 1 << 5;
     result[5] = fontWeight.index;
   }
   if (fontStyle != null) {
-    result[0] |= 1 << 7;
+    result[0] |= 1 << 6;
     result[6] = fontStyle.index;
   }
   if (textBaseline != null) {
-    result[0] |= 1 << 8;
+    result[0] |= 1 << 7;
     result[7] = textBaseline.index;
   }
+  if (decorationThickness != null) {
+    result[0] |= 1 << 8;
+  }
   if (fontFamily != null || (fontFamilyFallback != null && fontFamilyFallback.isNotEmpty)) {
     result[0] |= 1 << 9;
     // Passed separately to native.

lib/ui/text/paragraph_builder.cc

@@ -33,10 +33,10 @@ const int tsColorIndex = 1;
 const int tsTextDecorationIndex = 2;
 const int tsTextDecorationColorIndex = 3;
 const int tsTextDecorationStyleIndex = 4;
-const int tsTextDecorationThicknessIndex = 5;
-const int tsFontWeightIndex = 6;
-const int tsFontStyleIndex = 7;
-const int tsTextBaselineIndex = 8;
+const int tsFontWeightIndex = 5;
+const int tsFontStyleIndex = 6;
+const int tsTextBaselineIndex = 7;
+const int tsTextDecorationThicknessIndex = 8;
 const int tsFontFamilyIndex = 9;
 const int tsFontSizeIndex = 10;
 const int tsLetterSpacingIndex = 11;