Revert "Filter JUnit and android.test classes from applications using proguard"

This reverts commit f22aca1e47a4cb7833afb42a90eee363a2258cb5.

Switching to use -systemjars instead of -libraryjars means that it is no longer
necessary to filter out the junit and android.test classes from jars to which
Proguard is being applied.

Bug: 30188076
Bug: 69156675
Test: make checkbuild
Change-Id: I36e14d28e01517927b458d69ade8ccb2c79a3340
diff --git a/core/definitions.mk b/core/definitions.mk
index a20bf44..9bba4f8 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2800,15 +2800,13 @@
 ###########################################################
 ifdef TARGET_OPENJDK9
 define transform-jar-to-proguard
-@echo Skipping Proguard: $<$(PRIVATE_PROGUARD_INJAR_FILTERS) $@
+@echo Skipping Proguard: $< $@
 $(hide) cp '$<' $@
 endef
 else
 define transform-jar-to-proguard
 @echo Proguard: $@
-$(hide) $(PROGUARD) -injars '$<$(PRIVATE_PROGUARD_INJAR_FILTERS)' \
-    -outjars $@ \
-    $(PRIVATE_PROGUARD_FLAGS) \
+$(hide) $(PROGUARD) -injars $< -outjars $@ $(PRIVATE_PROGUARD_FLAGS) \
     $(addprefix -injars , $(PRIVATE_EXTRA_INPUT_JAR))
 endef
 endif
@@ -2819,7 +2817,7 @@
 ###########################################################
 define transform-jar-to-dex-r8
 @echo R8: $@
-$(hide) $(R8_COMPAT_PROGUARD) -injars '$<$(PRIVATE_PROGUARD_INJAR_FILTERS)' \
+$(hide) $(R8_COMPAT_PROGUARD) -injars '$<' \
     --min-api $(PRIVATE_MIN_SDK_VERSION) \
     --force-proguard-compatibility --output $(subst classes.dex,,$@) \
     $(PRIVATE_PROGUARD_FLAGS) \