Fix classpath to resolve the platform-proto

Test: open eclipse
Bug: 120607010
Change-Id: I76deaa590b1f7b40078ce584551df94e0f2d9584
diff --git a/.classpath b/.classpath
index 12e5865..890e9d5 100644
--- a/.classpath
+++ b/.classpath
@@ -27,5 +27,6 @@
 	<classpathentry kind="var" path="TRADEFED_ROOT/out/soong/.intermediates/platform_testing/libraries/aoa-helper/aoa-helper/linux_glibc_common/combined/aoa-helper.jar"/>
 	<classpathentry kind="var" path="TRADEFED_ROOT/prebuilts/tools/common/google-api-java-client/1.23.0/google-api-java-client-min-repackaged-1.23.0.jar"/>
 	<classpathentry kind="var" path="TRADEFED_ROOT/out/soong/.intermediates/prebuilts/tools/common/google-api-services-compute/google-api-services-compute/linux_glibc_common/combined/google-api-services-compute.jar"/>
+	<classpathentry kind="var" path="TRADEFED_ROOT/prebuilts/misc/common/frameworks/platformprotos-prebuilt.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>