Support preprocessed prebuilt tests in androidmk

Adds support to translate app prebuilt tests to android_test_import and
LOCAL_REPLACE_PREBUILT_APK_INSTALLED to preprocessed property.

Test: androidmk_test.go, bpfix_test.go
Bug: 155412211
Change-Id: I77c07c684125adf228ba91911998823a68b3a65d