Add R8 support to Soong.

Move R8_COMPAT_PROGUARD definition to Soong.
Copy the proguard_dictionary file so that the find
command that builds proguard_dict.zip can find it.

Test: m checkbuild
Change-Id: I28b2fce26ccb6225be0bd71802a43fe63df85daa
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index e9c07df..b4a03ea 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -232,6 +232,7 @@
 LOCAL_SOONG_DEX_JAR :=
 LOCAL_SOONG_HEADER_JAR :=
 LOCAL_SOONG_JACOCO_REPORT_CLASSES_JAR :=
+LOCAL_SOONG_PROGUARD_DICT :=
 LOCAL_SOONG_RESOURCE_EXPORT_PACKAGE :=
 LOCAL_SOONG_RRO_DIRS :=
 # '',true
diff --git a/core/config.mk b/core/config.mk
index 4a0c540..3743c7c 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -581,8 +581,6 @@
   ZIPALIGN := $(prebuilt_build_tools_bin)/zipalign
 endif # TARGET_BUILD_APPS || TARGET_BUILD_PDK
 
-R8_COMPAT_PROGUARD := $(HOST_OUT_EXECUTABLES)/r8-compat-proguard
-
 ifeq (,$(TARGET_BUILD_APPS))
   # Use RenderScript prebuilts for unbundled builds but not PDK builds
   LLVM_RS_CC := $(HOST_OUT_EXECUTABLES)/llvm-rs-cc
diff --git a/core/soong_app_prebuilt.mk b/core/soong_app_prebuilt.mk
index 0059e51..65aabff 100644
--- a/core/soong_app_prebuilt.mk
+++ b/core/soong_app_prebuilt.mk
@@ -27,6 +27,13 @@
     $(intermediates.COMMON)/jacoco-report-classes.jar)
 endif
 
+ifdef LOCAL_SOONG_PROGUARD_DICT
+  $(eval $(call copy-one-file,$(LOCAL_SOONG_PROGUARD_DICT),\
+    $(intermediates.COMMON)/proguard_dictionary))
+  $(call add-dependency,$(LOCAL_BUILT_MODULE),\
+    $(intermediates.COMMON)/proguard_dictionary)
+endif
+
 ifneq ($(TURBINE_DISABLED),false)
 ifdef LOCAL_SOONG_HEADER_JAR
 $(eval $(call copy-one-file,$(LOCAL_SOONG_HEADER_JAR),$(full_classes_header_jar)))