Enforce min_sdk_version=29

`libincidentpriv_defaults` are the defaults for
`libincident*`, which includes `libincident_test`.
This test is run as part of the MTS suite, setting min_sdk_version
ensures backwards compatibility with devices Q and above.

Test: atest [<mod_name>...]
Bug: 156476221
Change-Id: I9e6656662ec7337bc56e973921b69b866b0daacb
diff --git a/libs/incident/Android.bp b/libs/incident/Android.bp
index 697cbb9..b5af3c6 100644
--- a/libs/incident/Android.bp
+++ b/libs/incident/Android.bp
@@ -60,6 +60,7 @@
         ":libincident_aidl",
         "src/IncidentReportArgs.cpp",
     ],
+    min_sdk_version: "29",
 }
 
 cc_library_shared {