oniro.inc: Have a selection on the java provider from meta-java

This avoids build warnings and it is in line with what meta-openharmony
is using.

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-oniro-core/conf/distro/include/oniro.inc

@@ -5,3 +5,7 @@
 require conf/distro/include/security_flags.inc
 
 INHERIT += "oniro-sanity"
+
+# Configuration needed for meta-java layer
+PREFERRED_PROVIDER_virtual/java-initial-native ?= "cacao-initial-native"
+PREFERRED_PROVIDER_virtual/java-native ?= "cacao-native"