Copy generated $(SOONG_OUT_DIR)/module_bp_java_deps.json file to dist when...

Copy generated $(SOONG_OUT_DIR)/module_bp_java_deps.json file to dist when SOONG_COLLECT_JAVA_DEPS flag is set.

Test: build/soong/soong_ui.bash --make-mode SKIP_ABI_CHECKS=true SOONG_COLLECT_JAVA_DEPS=true TARGET_PRODUCT=aosp_cf_x86_phone TARGET_BUILD_VARIANT=userdebug droid dist DIST_DIR=/usr/local/google/home/yifengzeng/temp EMMA_INSTRUMENT=true EMMA_INSTRUMENT_FRAMEWORK=true CLANG_COVERAGE=true NATIVE_COVERAGE_PATHS="*" NATIVE_COVERAGE_EXCLUDE_PATHS="art bionic/libc device" tests

Bug: 168755196
Change-Id: Id13d3a4579734bc70bc0ce3463a05ee9a052f1dc