Remove AAPT1 support

AAPT2 is used everywhere now, remove support for AAPT1.  Also
removes dpi_specific_apk.mk, it was never updated to use AAPT2
and has been generating bad APKs (resource ID mismatch between
the dex files and the resources) since AAPT2 was made the default
in May 2018 (I9b67fd2a9b3234798b2aac879b5242c2097b3863).

Bug: 80450981
Test: m checkbuild
Change-Id: I2ff768897360ff866dbae5562455bab22be270f7
Merged-In: I2ff768897360ff866dbae5562455bab22be270f7
diff --git a/core/java.mk b/core/java.mk
index c3787ae..66431e9 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -422,10 +422,8 @@
 common_proguard_flags += -dontshrink # don't shrink tests by default
 endif # test package
 ifneq ($(LOCAL_PROGUARD_ENABLED),custom)
-  ifeq ($(LOCAL_USE_AAPT2),true)
-    common_proguard_flag_files += $(foreach l,$(LOCAL_STATIC_ANDROID_LIBRARIES),\
-        $(call intermediates-dir-for,JAVA_LIBRARIES,$(l),,COMMON)/export_proguard_flags)
-  endif
+  common_proguard_flag_files += $(foreach l,$(LOCAL_STATIC_ANDROID_LIBRARIES),\
+      $(call intermediates-dir-for,JAVA_LIBRARIES,$(l),,COMMON)/export_proguard_flags)
 endif
 ifneq ($(common_proguard_flag_files),)
 common_proguard_flags += $(addprefix -include , $(common_proguard_flag_files))