Add TEST_MAPPING

Add VtsHalPowerTargetTest into presubmit tests.

Bug: b/253516147
Test: atest VtsHalPowerTargetTest
Change-Id: Ie1fa80a5bdf9baa084dbfa4603414eb97afb15a6
diff --git a/power/TEST_MAPPING b/power/TEST_MAPPING
new file mode 100644
index 0000000..c0963f9
--- /dev/null
+++ b/power/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "presubmit": [
+    {
+      "name": "VtsHalPowerTargetTest"
+    }
+  ]
+}