Increase max heap space in base gradle.properties, since the default of 512m leads to failed builds

Signed-off-by: Joshua Soberg <j15soberg@gmail.com>

gradle.properties

@@ -5,3 +5,6 @@ NC_TEST_SERVER_PASSWORD=test
 android.enableJetifier=true
 android.useAndroidX=true
 #android.debug.obsoleteApi=true
+
+# Minimum max heap space to get reliable builds
+org.gradle.jvmargs=-Xmx1g