frameworks/base: 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: I4233b9091d9066c4fa69f3d24aaf367ea500f760
diff --git a/tests/privapp-permissions/Android.mk b/tests/privapp-permissions/Android.mk
index 3c80ad8..9795188 100644
--- a/tests/privapp-permissions/Android.mk
+++ b/tests/privapp-permissions/Android.mk
@@ -2,6 +2,7 @@
 
 include $(CLEAR_VARS)
 LOCAL_PACKAGE_NAME := PrivAppPermissionTest
+LOCAL_SDK_VERSION := current
 LOCAL_PRIVILEGED_MODULE := true
 LOCAL_MANIFEST_FILE := system/AndroidManifest.xml
 LOCAL_REQUIRED_MODULES := privapp-permissions-test.xml
@@ -16,6 +17,7 @@
 
 include $(CLEAR_VARS)
 LOCAL_PACKAGE_NAME := VendorPrivAppPermissionTest
+LOCAL_SDK_VERSION := current
 LOCAL_PRIVILEGED_MODULE := true
 LOCAL_MANIFEST_FILE := vendor/AndroidManifest.xml
 LOCAL_VENDOR_MODULE := true
@@ -31,6 +33,7 @@
 
 include $(CLEAR_VARS)
 LOCAL_PACKAGE_NAME := ProductPrivAppPermissionTest
+LOCAL_SDK_VERSION := current
 LOCAL_PRIVILEGED_MODULE := true
 LOCAL_MANIFEST_FILE := product/AndroidManifest.xml
 LOCAL_PRODUCT_MODULE := true