Disable Gradle build cache.

We hit a number of build errors where we get:
"Could not load entry 93e355cc36aae55d0897e79da14be6b6 from local build cache"
This change disables using build cache.

Test: None
Change-Id: I4029c86673871b9fa39c89b60aaa71b063287bf6

diff --git a/gradle.properties b/gradle.properties
index e5750c9..9b77c57 100644
--- a/gradle.properties
+++ b/gradle.properties

@@ -3,5 +3,4 @@
 # Disabled due to b/63329112
 # org.gradle.configureondemand=true
 org.gradle.parallel=true
-org.gradle.caching=true
 android.useDexArchive=false