Add coverage flags for Clang coverage builds.

Bug: 143977934
Test: m CLANG_COVERAGE=true
Test: m NATIVE_COVERAGE=true
Change-Id: I5d07d336e241856961eb0bc9678fdc9d5a076802
diff --git a/android/config.go b/android/config.go
index 1e5a24d..db8e98e 100644
--- a/android/config.go
+++ b/android/config.go
@@ -944,6 +944,10 @@
 	return Bool(c.config.productVariables.NativeCoverage)
 }
 
+func (c *deviceConfig) ClangCoverageEnabled() bool {
+	return Bool(c.config.productVariables.ClangCoverage)
+}
+
 func (c *deviceConfig) CoverageEnabledForPath(path string) bool {
 	coverage := false
 	if c.config.productVariables.CoveragePaths != nil {