Introduce derive_classpath service.

go/updatable-classpath

Bug: 180105615
Test: manual + boot test
Change-Id: If0a3cb00754834133abea12caff3fdc5b7cff696
Merged-In: If0a3cb00754834133abea12caff3fdc5b7cff696

apex/allowed_deps.txt

diff --git a/apex/allowed_deps.txt b/apex/allowed_deps.txt
index 8694f26..f40cb62 100644
--- a/apex/allowed_deps.txt
+++ b/apex/allowed_deps.txt
@@ -165,6 +165,7 @@
 crtend_so(minSdkVersion:apex_inherit)
 datastallprotosnano(minSdkVersion:29)
 datastallprotosnano(minSdkVersion:current)
+derive_classpath(minSdkVersion:30)
 derive_sdk(minSdkVersion:30)
 derive_sdk(minSdkVersion:current)
 derive_sdk_prefer32(minSdkVersion:30)
@@ -302,6 +303,7 @@
 libcutils(minSdkVersion:29)
 libcutils_headers(minSdkVersion:29)
 libcutils_sockets(minSdkVersion:29)
+libderive_classpath(minSdkVersion:30)
 libderive_sdk(minSdkVersion:30)
 libdiagnose_usb(minSdkVersion:(no version))
 libdl(minSdkVersion:(no version))