Add clarifying paranthesis to ByteUtils

Change-Id: Ie1b55806d33b04f35d0060d5990f23feadb80c6f
diff --git a/src/main/java/com/android/tools/r8/lightir/ByteUtils.java b/src/main/java/com/android/tools/r8/lightir/ByteUtils.java
index 5d6d5a7..a4a4bdf 100644
--- a/src/main/java/com/android/tools/r8/lightir/ByteUtils.java
+++ b/src/main/java/com/android/tools/r8/lightir/ByteUtils.java
@@ -7,7 +7,7 @@
 public class ByteUtils {
 
   public static boolean isU1(int value) {
-    return 0 <= value && value <= 0xFF;
+    return (0 <= value) && (value <= 0xFF);
   }
 
   // Lossy truncation of an integer value to its lowest byte.
@@ -37,14 +37,14 @@
   }
 
   public static boolean isU2(int value) {
-    return value >= 0 && value <= 0xFFFF;
+    return (value >= 0) && (value <= 0xFFFF);
   }
 
   public static int unsetBitAtIndex(int value, int index) {
-    return value & ~(1 << index - 1);
+    return value & ~(1 << (index - 1));
   }
 
   public static int setBitAtIndex(int value, int index) {
-    return value | (1 << index - 1);
+    return value | (1 << (index - 1));
   }
 }