Reland "Update clang version to clang-r468909"

This reverts commit fc21a0e55bac3ba4c73f7bdb2f963ec38a8903c4.
Reason for revert: broken builds/tests were fixed

Bug: 241011085
Change-Id: Ifba0bb05e690c8204e3ef34f59d7bf7ef57638ed
diff --git a/cc/config/global.go b/cc/config/global.go
index a7701b9..bf80907 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -244,6 +244,10 @@
 		"-Wno-error=unused-but-set-parameter", // http://b/197240255
 		// New warnings to be fixed after clang-r458507
 		"-Wno-error=unqualified-std-cast-call", // http://b/239662094
+		// New warnings to be fixed after clang-r468909
+		"-Wno-error=array-parameter",     // http://b/241941550
+		"-Wno-error=deprecated-builtins", // http://b/241601211
+		"-Wno-error=deprecated",          // in external/googletest/googletest
 	}
 
 	noOverrideExternalGlobalCflags = []string{
@@ -308,8 +312,8 @@
 
 	// prebuilts/clang default settings.
 	ClangDefaultBase         = "prebuilts/clang/host"
-	ClangDefaultVersion      = "clang-r458507"
-	ClangDefaultShortVersion = "15.0.1"
+	ClangDefaultVersion      = "clang-r468909"
+	ClangDefaultShortVersion = "15.0.2"
 
 	// Directories with warnings from Android.bp files.
 	WarningAllowedProjects = []string{