Add ApexInfo.RequiresLibs to mixed build handler for apex

Adding ApexInfo.RequiresLibs from Bazel to apexBundle.requiredDeps which is eventuallyread by apex androidmk writer for LOCAL_REQUIRED_MODULES to ensures the libs are installed as part of a bundle build.

In Soong, apexBundle.requiredDeps is set in
https://cs.android.com/android/platform/build/soong/+/master:apex/apex.go;l=2305-2323;drc=cb7e73bc0130a95f5991c925c349387185abc098

The same logic is replicated in Bazel at
https://cs.android.com/android/platform/build/bazel/+/master:rules/apex/cc.bzl;l=141-163;drc=cb7e73bc0130a95f5991c925c349387185abc098.

This CL is porting the required libs set by Bazel in mixed build.

Test: go test
Test: run build/bazel/ci/mixed_libc.sh
Bug: 215500321
Change-Id: Id7256d279ac09a8fd42db391a7e93ce0021d8345

apex/apex_test.go

@@ -9835,11 +9835,11 @@ apex {
 						JavaSymbolsUsedByApex: "foo_using.xml",
 						BundleFile:            "apex_bundle.zip",
 						InstalledFiles:        "installed-files.txt",
+						RequiresLibs:          []string{"//path/c:c", "//path/d:d"},
 
 						// unused
 						PackageName:  "pkg_name",
 						ProvidesLibs: []string{"a", "b"},
-						RequiresLibs: []string{"c", "d"},
 					},
 				},
 			}
@@ -9895,4 +9895,7 @@ apex {
 	if w := "$(call dist-for-goals,checkbuild,out/bazel/execroot/__main__/installed-files.txt:foo-installed-files.txt)"; !strings.Contains(data, w) {
 		t.Errorf("Expected %q in androidmk data, but did not find %q", w, data)
 	}
+	if w := "LOCAL_REQUIRED_MODULES := c d"; !strings.Contains(data, w) {
+		t.Errorf("Expected %q in androidmk data, but did not find it in %q", w, data)
+	}
 }