Add a "track-app" service in adbd. For every debuggable or
profileable-from-shell process, ART sends related info to
adbd and adbd surfaces the info through the "track-app"
service.
The output format of "track-app" is a line summarizing
the number of reported processes, followed by a protobuf
message in human readable form. For example,
Process count: 2
process {
pid: 3307
profileable: true
architecture: "arm64"
}
process {
pid: 3341
debuggable: true
profileable: true
architecture: "arm64"
}
Bug: 149050485
Test: manually unplugged/replugged, "adb track-app",
"adb track-jdwp"
Change-Id: Id1f1a920e1afc148c7e4d2add790baab796178e1
f4ffae1055