Add first api level to device info collector

Bug: 111812943
Test: run vts
Change-Id: Ifcb540f1d89ba9803e0a8773595bf736c4f8d60b
Merged-In: Ifcb540f1d89ba9803e0a8773595bf736c4f8d60b
diff --git a/harnesses/tradefed/src/com/android/tradefed/targetprep/VtsDeviceInfoCollector.java b/harnesses/tradefed/src/com/android/tradefed/targetprep/VtsDeviceInfoCollector.java
index b7ce633..181cf56 100644
--- a/harnesses/tradefed/src/com/android/tradefed/targetprep/VtsDeviceInfoCollector.java
+++ b/harnesses/tradefed/src/com/android/tradefed/targetprep/VtsDeviceInfoCollector.java
@@ -54,6 +54,7 @@
         BUILD_KEYS.put("cts:build_abis", "ro.product.cpu.abilist");
         BUILD_KEYS.put("cts:build_abis_32", "ro.product.cpu.abilist32");
         BUILD_KEYS.put("cts:build_abis_64", "ro.product.cpu.abilist64");
+        BUILD_KEYS.put("cts:build_first_api_level", "ro.product.first_api_level");
         BUILD_KEYS.put("cts:build_serial", "ro.serialno");
         BUILD_KEYS.put("cts:build_version_release", "ro.build.version.release");
         BUILD_KEYS.put("cts:build_version_sdk", "ro.build.version.sdk");