Introduce SIZE_BYTES and SIZE_BITS constants for all integral types

#KT-8247 Fixed

core/builtins/native/kotlin/Char.kt

@@ -89,6 +89,18 @@ public class Char private constructor() : Comparable<Char> {
          * The maximum value of a Unicode surrogate code unit.
          */
         public const val MAX_SURROGATE: Char = MAX_LOW_SURROGATE
+
+        /**
+         * The number of bytes used to represent a Char in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BYTES: Int = 2
+
+        /**
+         * The number of bits used to represent a Char in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BITS: Int = 16
     }
 
 }

core/builtins/native/kotlin/Primitives.kt

@@ -22,6 +22,18 @@ public class Byte private constructor() : Number(), Comparable<Byte> {
          * A constant holding the maximum value an instance of Byte can have.
          */
         public const val MAX_VALUE: Byte = 127
+
+        /**
+         * The number of bytes used to represent an instance of Byte in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BYTES: Int = 1
+
+        /**
+         * The number of bits used to represent an instance of Byte in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BITS: Int = 8
     }
 
     /**
@@ -198,6 +210,18 @@ public class Short private constructor() : Number(), Comparable<Short> {
          * A constant holding the maximum value an instance of Short can have.
          */
         public const val MAX_VALUE: Short = 32767
+
+        /**
+         * The number of bytes used to represent an instance of Short in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BYTES: Int = 2
+
+        /**
+         * The number of bits used to represent an instance of Short in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BITS: Int = 16
     }
 
     /**
@@ -374,6 +398,18 @@ public class Int private constructor() : Number(), Comparable<Int> {
          * A constant holding the maximum value an instance of Int can have.
          */
         public const val MAX_VALUE: Int = 2147483647
+
+        /**
+         * The number of bytes used to represent an instance of Int in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BYTES: Int = 4
+
+        /**
+         * The number of bits used to represent an instance of Int in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BITS: Int = 32
     }
 
     /**
@@ -565,6 +601,18 @@ public class Long private constructor() : Number(), Comparable<Long> {
          * A constant holding the maximum value an instance of Long can have.
          */
         public const val MAX_VALUE: Long = 9223372036854775807L
+
+        /**
+         * The number of bytes used to represent an instance of Long in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BYTES: Int = 8
+
+        /**
+         * The number of bits used to represent an instance of Long in a binary form.
+         */
+        @SinceKotlin("1.3")
+        public const val SIZE_BITS: Int = 64
     }
 
     /**