Update macros header

Updates the macros header to ensure redefinition of macros doesn't
happen and adds a helper macro for determining if a bit is set in a
provided value.

Bug: 171916502
Test: N/A
Merged-In: I27ff6226058b15316b0a8739acd27e2a74b5e43a
Merged-In: I6b486106bcd9bf48c5ee0f4ca69bc38b49b72d96
Change-Id: I6b486106bcd9bf48c5ee0f4ca69bc38b49b72d96

util/include/chre/util/macros.h

diff --git a/util/include/chre/util/macros.h b/util/include/chre/util/macros.h
index 92160b8..2fe7d7e 100644
--- a/util/include/chre/util/macros.h
+++ b/util/include/chre/util/macros.h
@@ -24,14 +24,26 @@
 /**
  * Obtains the number of elements in a C-style array.
  */
+#ifndef ARRAY_SIZE
 #define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
+#endif
+
+#ifndef ARRAY_END
 #define ARRAY_END(array) (array + ARRAY_SIZE(array))
+#endif
+
+/** Determines if the provided bit is set in the provided value. */
+#ifndef IS_BIT_SET
+#define IS_BIT_SET(value, bit) (((value) & (bit)) == (bit))
+#endif
 
 /**
  * Performs macro expansion then converts the value into a string literal
  */
+#ifndef STRINGIFY
 #define STRINGIFY(x) STRINGIFY2(x)
 #define STRINGIFY2(x) #x
+#endif
 
 // Compiler-specific functionality
 #if defined(__clang__) || defined(__GNUC__)