Fix file permissions

Java source files are not generally executable.

Change-Id: I4fe45a3eb7bc136ba29dd6632bf9865f2f940bf3
diff --git a/tests/cts/net/src/android/net/http/cts/SslErrorTest.java b/tests/cts/net/src/android/net/http/cts/SslErrorTest.java
old mode 100755
new mode 100644