Move install component into config file.

This will allow for specifying the location of credential storage in a
resource overlay. The specific use case is for automotive builds in
which com.android.settings is replaced by com.android.car.settings.

Bug: 130199964
Bug: 139705828

Test:
-m cts-verifier
-adb install -g out/<path to apk>/CtsVerifier.apk
-adb shell setprop log.tag.KeyChainTest DEBUG
-Launch CTS Verifier from app launcher
-Scroll to "KeyChain Storage Test" in Security section
-Tap to begin test and follow prompts on screen
-Accept dialog prompt to install certificates
-Ensure toast is shown that certificates installed successfully
-Complete test steps and verify in logs that "Connection succeeded"
Change-Id: I77e69e934084059130b3b217992ef508e1c5f55c
Merged-In: I77e69e934084059130b3b217992ef508e1c5f55c
(cherry picked from commit 0045d56af4395ab26a30aa528ebfeadfec025e5d)