Use new soong_cc_rust_prebuilt.mk

soong_{cc,rust}_prebuilt.mk has been merged. Use the new file.

Bug: N/A, clean-up
Test: m
Change-Id: I3f03e866815f6394aacd8cb0deba04f381b78c29
diff --git a/apex/androidmk.go b/apex/androidmk.go
index d612f1e..c68d2c1 100644
--- a/apex/androidmk.go
+++ b/apex/androidmk.go
@@ -262,7 +262,7 @@
 					fmt.Fprintln(w, "LOCAL_PREBUILT_COVERAGE_ARCHIVE :=", ccMod.CoverageOutputFile().String())
 				}
 			}
-			fmt.Fprintln(w, "include $(BUILD_SYSTEM)/soong_cc_prebuilt.mk")
+			fmt.Fprintln(w, "include $(BUILD_SYSTEM)/soong_cc_rust_prebuilt.mk")
 		default:
 			fmt.Fprintln(w, "LOCAL_MODULE_STEM :=", fi.stem())
 			if fi.builtFile == a.manifestPbOut && apexType == flattenedApex {