CDD: Add CDD language for APK signature v3

- Adding the new req to accommodate for the new signing scheme v3.

Bug: 73821473
Test: None
Change-Id: Ied3a5c826ce34f1a0132f4b083ae42b03aaf5fd2
diff --git a/4_application-packaging/4_0_intro.md b/4_application-packaging/4_0_intro.md
index 1a25035..a75ffa2 100644
--- a/4_application-packaging/4_0_intro.md
+++ b/4_application-packaging/4_0_intro.md
@@ -8,9 +8,13 @@
 http://developer.android.com/tools/help/index.html).
    *   As the above requirement may be challenging, device implementations are
    RECOMMENDED to use the AOSP reference implementation's package management
-   systemDevice implementations.
+   system.
+
+Device implementations:
+
 *    [C-0-2] MUST support verifying “.apk” files using the
-[APK Signature Scheme v2](https://source.android.com/security/apksigning/v2.html)
+[APK Signature Scheme v3](https://source.android.com/security/apksigning/v3.html)
+, [APK Signature Scheme v2](https://source.android.com/security/apksigning/v2.html)
 and [JAR signing](
 https://source.android.com/security/apksigning/v2.html#v1-verification).
 *    [C-0-3] MUST NOT extend either the