Add support for JNI libraries to android_app modules

Make android_app modules a MultiTargets module, which means the
common variant will have a list of Targets that it needs to handle.
Collect JNI libraries for each Target, and package them into or
alongside the APK.

Bug: 80095087
Test: app_test.go
Change-Id: Iabd3921e1d4c4b4cfcc7e131a0b0d9ab83b0ebbb
diff --git a/Android.bp b/Android.bp
index aeabb13..eefa149 100644
--- a/Android.bp
+++ b/Android.bp
@@ -219,6 +219,7 @@
         "blueprint-pathtools",
         "soong",
         "soong-android",
+        "soong-cc",
         "soong-genrule",
         "soong-java-config",
         "soong-tradefed",