tools: fix config whitespace format in cpu_profile
tools: fix config whitespace format in cpu_profile

the trace config generated by cpu_profile script generates a config
with all lines having an extra 2-space indent (except the first),
some other lines having incorrect indent, and some blank lines, where
there shouldn't be any.

This CL adjusts the format of the generated trace config so that
whitespace is consistent.

testing: ./tools/cpu_profile -n surfaceflinger,system_server --print-config

verify the formatting for the printed config looks consistent.

Change-Id: I377c7e62a2d90c128751403833902df941e233fd

google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto