Add ANR traces to their own zip entries.

These files can be very large (O(20k) lines), so it makes more sense to
add them to their own zip entry.

Since this change could break tools that are expecting that section,
it's only enabled when setting the dumpstate version to 2.0-dev-1:

adb shell setprop dumpstate.version 2.0-dev-1

Test: DumpstateTest passes; manual verification
Bug: 32470528
Bug: 32064548

Change-Id: I4726b2209b15722c22defa87bffb24dc633d5bcd
diff --git a/cmds/dumpstate/dumpstate.h b/cmds/dumpstate/dumpstate.h
index 568256a..ab36c41c 100644
--- a/cmds/dumpstate/dumpstate.h
+++ b/cmds/dumpstate/dumpstate.h
@@ -200,6 +200,12 @@
 static std::string VERSION_CURRENT = "1.0";
 
 /*
+ * Temporary version that adds a anr-traces.txt entry. Once tools support it, the current version
+ * will be bumped to 2.0-dev-1.
+ */
+static std::string VERSION_SPLIT_ANR = "2.0-dev-1";
+
+/*
  * "Alias" for the current version.
  */
 static std::string VERSION_DEFAULT = "default";