BinaryTransparencyService: Fix printing of preloaded app info.

Combine the printing of preloaded apps only to `mba_info` by
specifying `--preloads-only` option.

Bug: 261493591
Bug: 259347186
Test: Manual.
	adb shell cmd transparency get mba_info --preloads-only
Change-Id: Idb725fcb6b59afa4424cf22c6264fa5aae3571e7
1 file changed