cts: Set LOCAL_SDK_VERSION where possible.

This change sets LOCAL_SDK_VERSION for all packages where
this is possible without breaking the build, and
LOCAL_PRIVATE_PLATFORM_APIS := true otherwise.

Setting one of these two will be made required soon, and this
is a change in preparation for that. Not setting LOCAL_SDK_VERSION
makes the app implicitly depend on the bootclasspath, which is
often not required. This change effectively makes depending on
private apis opt-in rather than opt-out.

Test: make relevant packages
Bug: 73535841
Change-Id: I687153389dd4bfab1c83df5d9af83d89bed76fd4
Merged-In: I5afdfc8e1e523768db9065dd3571cb31bc1dfac5
diff --git a/hostsidetests/appsecurity/test-apps/InstantCookieApp2/Android.mk b/hostsidetests/appsecurity/test-apps/InstantCookieApp2/Android.mk
index b154ae2..6385123 100644
--- a/hostsidetests/appsecurity/test-apps/InstantCookieApp2/Android.mk
+++ b/hostsidetests/appsecurity/test-apps/InstantCookieApp2/Android.mk
@@ -25,6 +25,7 @@
 LOCAL_STATIC_JAVA_LIBRARIES := android-support-test
 
 LOCAL_PACKAGE_NAME := CtsInstantCookieApp2
+LOCAL_SDK_VERSION := current
 
 LOCAL_COMPATIBILITY_SUITE := cts vts general-tests