Bug 1667525: Rename "Find friends" to "Find people"
This makes it less ambigious who you are searching for. With "Find friends" you can think that you can only find existing friends. However, you can actually also just use the search to find people without having to add them as a friend, e.g. to find portfolios of them more quickly. Change-Id: I066569a2a37c0e7b4f15ad2ad56010bdf3ba2bc3