Allow tests to be disabled for presubmit check

A test can be disabled in two ways:
1. Add the test name to ALL_DISABLED_PRESUBMIT_TESTS variable.
   Integration tests (tests inside TradeFed) can only be disabled in
   this way.
2. In module config, set LOCAL_PRESUBMIT_DISABLED to true. This works
   for tests with build target.

This change allows tests to be skipped in presubmit check to be saved in
a list that's included in test-mappings.zip build artifact.

Bug: 74971025
Test: m dist -j test-mapping
Change-Id: I6e3016b017ce1ade024dc4ded72a10c778b88e7f
diff --git a/core/definitions.mk b/core/definitions.mk
index fe96688..6f029e9 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -102,6 +102,9 @@
 # All installed vintf manifest fragments for a partition at
 ALL_VINTF_MANIFEST_FRAGMENTS_LIST:=
 
+# All tests that should be skipped in presubmit check.
+ALL_DISABLED_PRESUBMIT_TESTS :=
+
 ###########################################################
 ## Debugging; prints a variable list to stdout
 ###########################################################