Add photo picker tests

Test: atest PhotoPickerTest
Bug: 186089715
Change-Id: I8d5426c47d0d23fcf85155f9aa725d62c0dbf3c6
Merged-In: I8d5426c47d0d23fcf85155f9aa725d62c0dbf3c6
(cherry picked from commit 58456bfeea410d2dcc44e9bdf96e0645b54d35fc)
5 files changed