Updated activity dumpsys to include process capability flags.

Bug: 432782474
Test: manual (adb shell dumpsys activity --proto > activity.bin; m
graph_ams; graph_ams activity.bin --format json > activity.json; look
for capabilityFlags property)
Flag: EXEMPTED proto update

Change-Id: If72552023136b24f34e848b77a700c93d32c132b