Preserve <uses-library> order in dexpreopt.config files.

Library order is important because it is used to construct class loader
context, which is then written into OAT/ODEX files and chacked against
class loader context constructed by PackageManager on the device. If the
orders are different, dexpreopted code is rejected.

This CL fixes a few problems that caused reordering:

- 'filter' function arguments are swapped so that patterns list comes
  first, and the library list second

- JSON representation of class loader context is changed to avoid
  unmarshaling it to Go maps, which may reorder keys

- library list is no longer sorted (it's unclear why it was sorted)

Bug: 132357300
Test: lunch cf_x86_64_phone-userdebug && m && launch_cvd \
      adb wait-for-device && adb root && adb logcat \
      | grep -E 'ClassLoaderContext [a-z ]+ mismatch'
      # empty grep output, no errors
Change-Id: Ie76996d497e60da0948f1879d6db589ff3e968a2

common/json.mk

@@ -24,7 +24,10 @@ add_json_list =$= $(call add_json_val,$(1),$(call json_list,$(patsubst %,%,$(2))
 add_json_csv =$= $(call add_json_val,$(1),$(call csv_to_json_list,$(strip $(2))))
 add_json_bool =$= $(call add_json_val,$(1),$(if $(strip $(2)),true,false))
 add_json_map =$= $(eval _json_contents := $$(_json_contents)$$(_json_indent)"$$(strip $$(1))": {$$(newline))$(json_increase_indent)
+add_json_map_anon =$= $(eval _json_contents := $$(_json_contents)$$(_json_indent){$$(newline))$(json_increase_indent)
 end_json_map =$= $(json_decrease_indent)$(eval _json_contents := $$(_json_contents)$$(if $$(filter %$$(comma),$$(lastword $$(_json_contents))),__SV_END)$$(_json_indent)},$$(newline))
+add_json_array =$= $(eval _json_contents := $$(_json_contents)$$(_json_indent)"$$(strip $$(1))": [$$(newline))$(json_increase_indent)
+end_json_array =$= $(json_decrease_indent)$(eval _json_contents := $$(_json_contents)$$(if $$(filter %$$(comma),$$(lastword $$(_json_contents))),__SV_END)$$(_json_indent)],$$(newline))
 
 # Clears _json_contents to start a new json file
 json_start =$= $(eval _json_contents := {$$(newline))$(eval _json_indent := $$(4space))