Enable stripping of java debug information when required.

We're removing LocalVariableType / LocalVariableType in order to
save space. Enabling stripping reduces AOSP  image size save
by ~12MB.

Bug: 38224820
Test: CtsLibcoreTestCases
Change-Id: I3168d73ec6825aa5879db7e1135d7ed61d488d72
diff --git a/core/product.mk b/core/product.mk
index 34cd21c..6e93716 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -133,6 +133,7 @@
     PRODUCT_ART_USE_READ_BARRIER \
     PRODUCT_IOT \
     PRODUCT_SYSTEM_HEADROOM \
+    PRODUCT_MINIMIZE_JAVA_DEBUG_INFO \