Revert "fb: remove KeyguardTestActivity"

This reverts commit e64f7d5824dc37cd2ecf1ea4f8ecca79ad2ccfe0.
Revert "PEEK: configurable pickup timeout (1/2)"

This reverts commit 547dd36b76661426e598546ebe2e792a41f82f9f.
Revert "Peek: adjust timeout and wakelock slightly"

This reverts commit e6c2800104d4f50a135e93477ac1fbfbbb010c42.
Revert "Port PEEK from PA and fix compiles [1/2]"

This reverts commit ca666c6e746d8ff1ceaf6ede81fdd91c3d1fd852.